游戏女神Alysa_QUEEN唯美写真5P,美女动态[福利美图...美女与帅哥肌肌对肌肌 - 图片
据法新社7月7日报道，俄罗斯和乌克兰的官员7日说，乌克兰夜间发动了一次无人机袭击，导致靠近两国边界的俄罗斯沃罗涅日地区一个军需仓库着火。
2024年12月18日，"明明，哥哥嫂子的意思是，这4000块钱需要我们家每个人一起分摊一部分，这样他们的压力会小一些。"母亲替哥哥解释道。
游戏女神Alysa_QUEEN唯美写真5P,美女动态[福利美图...美女与帅哥肌肌对肌肌 - 图片
热门的单机手游推荐高质量的单机手游排行榜2023-10-09 12:47·lallwww在如今手游市场百花齐放的时代单机手游因其独特的游戏体验和便捷的游戏方式成为了众多游戏爱好者的首选那么在众多的单机手游中有哪些备受热爱者追捧的高质量游戏呢本期小编将为大家推荐几款高质量的单机手游现在我们就一起去看看吧随着时代的进步现在的游戏基本都从休闲娱乐过渡成氪金游戏同时也演变出许多特殊账号其中内部号就是最常见的并且现在的游戏基本都存在这种内部号这种账号新上线即有5000真充每天上线还有500-1000的扶持金据大量数据分析这种账号大部分都来自 荧虎游戏官网高质量的单机手游排行榜：1、《漂在江湖》《漂在江湖》是一款以江湖武侠为主题的单机手游游戏采用了精致细腻的次世代技术为玩家呈现了一个逼真的江湖世界游戏中拥有开放式全景大地图让玩家可以自由探索各种场景此外游戏还提供了丰富多样的玩法包括全3D视角自由操作、多重职业自由转职、360度自由轻功翱翔等等玩家可以通过炫酷特效、流光仙翼、旷世神兵、卓越坐骑以及情缘修仙等元素打造自己独特的江湖风采2、《三国战纪》《三国战纪》是一款以2D格斗为核心的手游以其复古的画面风格而备受瞩目游戏完美还原了千禧年街机模式中的三国战斗为玩家呈现了一场激烈而畅快的英雄对决玩家需要通过滑动摇杆来控制自己的英雄移动并利用技能控键和闪避键与敌人进行激烈的战斗游戏的操作难度适中偏上对于喜欢挑战的玩家来说是一次不错的游戏体验3、《怪物之家》《怪物之家》是一款以复古画面风格为特色的日式RPG剧情向手游游戏中玩家需要通过触摸屏幕来控制小人物移动并通过阅读关卡中的信件来寻找通关的方法游戏的音乐阴森诡谲画面独特奇异剧情内容主要讲述了一个孩子在怪物之家中解救父亲的故事对于喜欢猎奇剧情的玩家而言这款游戏绝对不容错过它将带给你一种全新的游戏体验让你沉浸在这个神秘而诡异的世界中4、《剑开仙门》《剑开仙门》是一款仙侠题材的手游带玩家进入一个神秘而壮丽的仙境游戏中玩家将扮演一位修仙者通过修炼武功、探索秘境和战胜强敌逐步成长为仙门中的顶尖强者游戏采用了精美的画面和流畅的战斗系统让玩家体验到华丽的技能特效和刺激的战斗场景此外游戏还融入了丰富的社交互动玩家可以结交好友、组队闯关共同探索仙境的奇遇《剑开仙门》将带给玩家一个充满仙侠风情和冒险乐趣的游戏世界让你在修仙的道路上追求卓越成就非凡5、《江湖悠悠》《江湖悠悠》是一款扣人心弦的武侠手游带您踏入一个充满江湖风情的世界游戏中玩家可以选择不同的职业如剑客、刺客、医仙等展开一段惊险刺激的江湖冒险之旅游戏以精美的画面和流畅的操作为特点让玩家体验到华丽的武技表现和激烈的战斗同时游戏中还有丰富的剧情和任务等待着玩家去探索与各路英雄豪杰交流并共同迎接江湖中的挑战好了以上就是本期的全部内容希望大家能够喜欢我们下期再见
这样一个在台球桌上叱咤风云的运动员曾经因为身材太好被判犯规，当年这个新闻也是火爆全国。丑迟迟辫蝉://飞飞飞.迟辞耻迟颈补辞.肠辞尘/补谤迟颈肠濒别/6538779591933166087/?肠丑补苍苍别濒=&蝉辞耻谤肠别=蝉别补谤肠丑冲迟补产
丑辞耻濒补颈，辫辞辫辞蝉丑耻濒颈补辞测颈驳别虫颈苍驳辩颈诲别测别，蝉丑补辞肠补颈迟耻颈虫颈补濒补颈，蝉丑耻辞蝉丑颈蝉丑颈尘别虫耻别测别产颈苍驳诲耻诲补辞锄丑颈，诲补苍蝉丑补辞锄丑辞苍驳箩颈耻蝉丑颈迟耻颈濒颈补辞。苍补蝉丑颈，驳辞苍驳驳辞苍驳驳别苍飞辞蝉丑颈辫颈苍蝉丑耻辞辩颈迟补丑耻颈辩耻，诲颈测颈测补苍箩颈补苍诲补辞辫辞辫辞蝉丑颈诲别肠丑补苍驳箩颈苍驳。飞辞辫辞辫辞肠耻颈谤耻辞诲颈濒颈耻虫颈补濒颈补辞测补苍濒别颈，飞别颈辩耻诲别丑别苍！丑别蝉丑颈蹿耻：迟补尘别苍肠颈迟耻颈飞辞诲别蝉丑颈办别蹿耻锄辞苍驳，测颈办补颈蝉丑颈箩颈苍辩耻诲别蝉丑颈丑辞耻迟补蝉丑耻辞蝉丑辞耻箩颈产耻锄丑耻苍濒耻测颈苍，飞辞锄颈箩颈蝉丑辞耻箩颈，辫颈苍驳蝉丑颈尘别产耻苍别苍驳濒耻测颈苍？丑别苍辩颈补苍驳蝉丑颈、丑别苍补辞尘补苍，飞辞驳别苍迟补诲颈苍驳诲颈苍驳锄耻颈濒颈补辞。
旅(尝惫)游(驰辞耻)专(窜丑耻补苍)列(尝颈别)：舒(厂丑耻)适(厂丑颈)出(颁丑耻)行(齿颈苍驳)的(顿别)不(叠耻)二(贰谤)之(窜丑颈)选(齿耻补苍)
飞耻濒辞苍驳！诲辞苍驳尘颈苍驳锄丑耻驳耻蹿别苍“诲辞苍驳箩颈别”虫耻箩颈苍驳测颈肠丑补苍驳蝉丑颈蹿别颈肠丑别苍驳产补颈锄丑耻补苍迟辞耻办辞苍驳，苍颈锄丑颈锄丑耻辞诲别测颈辩颈别，锄耻颈丑辞耻诲耻测补辞肠丑别苍驳耻颈肠丑别苍，迟耻驳耻颈迟耻，箩耻补苍谤耻苍补尘别诲耻辞诲别蝉丑颈蹿别颈，迟耻锄别苍驳蹿补苍苍补辞，测辞耻蝉丑颈尘别产颈测补辞。
《科(Ke)学(Xue)》（20220527出(Chu)版(Ban)）一(Yi)周(Zhou)论(Lun)文(Wen)导(Dao)读(Du)2022-05-29 21:39·科(Ke)学(Xue)网(Wang)编(Bian)译(Yi) | 李(Li)言(Yan)Science,27 MAY 2022, Volume 376 Issue 6596《科(Ke)学(Xue)》2022年(Nian)5月(Yue)27日(Ri)，第(Di)376卷(Juan)，6596期(Qi)材(Cai)料(Liao)科(Ke)学(Xue)Materials ScienceFerroelectricity in untwisted heterobilayers of transition metal dichalcogenides过(Guo)渡(Du)金(Jin)属(Shu)二(Er)卤(Lu)族(Zu)化(Hua)合(He)物(Wu)未(Wei)扭(Niu)曲(Qu)异(Yi)双(Shuang)层(Ceng)中(Zhong)的(De)铁(Tie)电(Dian)性(Xing)▲ 作(Zuo)者(Zhe)：LUKAS ROG?E, LVJIN WANG, YI ZHANG, SONGHUA CAI et al.▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abm5734▲ 摘(Zhai)要(Yao)：具(Ju)有(You)面(Mian)外(Wai)铁(Tie)电(Dian)和(He)压(Ya)电(Dian)特(Te)性(Xing)的(De)二(Er)维(Wei)材(Cai)料(Liao)是(Shi)实(Shi)现(Xian)超(Chao)薄(Bao)铁(Tie)和(He)压(Ya)电(Dian)电(Dian)子(Zi)器(Qi)件(Jian)的(De)理(Li)想(Xiang)材(Cai)料(Liao)。我(Wo)们(Men)通(Tong)过(Guo)一(Yi)步(Bu)化(Hua)学(Xue)气(Qi)相(Xiang)沉(Chen)积(Ji)法(Fa)合(He)成(Cheng)了(Liao)未(Wei)扭(Niu)曲(Qu)、相(Xiang)称(Cheng)和(He)外(Wai)延(Yan)的(De)MoS2/WS2异(Yi)质(Zhi)双(Shuang)层(Ceng)材(Cai)料(Liao)，意(Yi)外(Wai)证(Zheng)明(Ming)了(Liao)OOP铁(Tie)电(Dian)性(Xing)和(He)压(Ya)电(Dian)性(Xing)。我(Wo)们(Men)得(De)到(Dao)的(De)d33压(Ya)电(Dian)常(Chang)数(Shu)为(Wei)1.95 ~ 2.09皮(Pi)米(Mi)/伏(Fu)，比(Bi)单(Dan)层(Ceng)In2Se3的(De)自(Zi)然(Ran)OOP压(Ya)电(Dian)常(Chang)数(Shu)大(Da)6倍(Bei)。通(Tong)过(Guo)改(Gai)变(Bian)MoS2/WS2异(Yi)质(Zhi)双(Shuang)层(Ceng)的(De)极(Ji)化(Hua)状(Zhuang)态(Tai)，我(Wo)们(Men)证(Zheng)明(Ming)了(Liao)相(Xiang)应(Ying)铁(Tie)电(Dian)隧(Sui)道(Dao)结(Jie)器(Qi)件(Jian)中(Zhong)隧(Sui)穿(Chuan)电(Dian)流(Liu)可(Ke)进(Jin)行(Xing)约(Yue)三(San)个(Ge)数(Shu)量(Liang)级(Ji)调(Diao)制(Zhi)。我(Wo)们(Men)的(De)结(Jie)果(Guo)与(Yu)密(Mi)度(Du)泛(Fan)函(Han)理(Li)论(Lun)是(Shi)一(Yi)致(Zhi)的(De)，这(Zhe)表(Biao)明(Ming)对(Dui)称(Cheng)性(Xing)破(Po)缺(Que)和(He)层(Ceng)间(Jian)滑(Hua)动(Dong)都(Du)产(Chan)生(Sheng)了(Liao)意(Yi)想(Xiang)不(Bu)到(Dao)的(De)性(Xing)质(Zhi)，而(Er)不(Bu)需(Xu)要(Yao)调(Diao)用(Yong)扭(Niu)曲(Qu)角(Jiao)或(Huo)摩(Mo)尔(Er)畴(Chou)。▲ Abstract：Two-dimensional materials with out-of-plane (OOP) ferroelectric and piezoelectric properties are highly desirable for the realization of ultrathin ferro- and piezoelectronic devices. We demonstrate unexpected OOP ferroelectricity and piezoelectricity in untwisted, commensurate, and epitaxial MoS2/WS2 heterobilayers synthesized by scalable one-step chemical vapor deposition. We show d33 piezoelectric constants of 1.95 to 2.09 picometers per volt that are larger than the natural OOP piezoelectric constant of monolayer In2Se3 by a factor of ~6. We demonstrate the modulation of tunneling current by about three orders of magnitude in ferroelectric tunnel junction devices by changing the polarization state of MoS2/WS2 heterobilayers. Our results are consistent with density functional theory, which shows that both symmetry breaking and interlayer sliding give rise to the unexpected properties without the need for invoking twist angles or moiré domains.化(Hua)学(Xue)ChemistryHydrotrioxide (ROOOH) formation in the atmosphere在(Zai)大(Da)气(Qi)中(Zhong)形(Xing)成(Cheng)的(De)氢(Qing)三(San)氧(Yang)化(Hua)物(Wu)（ROOOH）▲ 作(Zuo)者(Zhe)：TORSTEN BERNDT, JING CHEN, EVA R. KJ?RGAARD et al.▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abn6012▲ 摘(Zhai)要(Yao)：有(You)机(Ji)氢(Qing)三(San)氧(Yang)化(Hua)物(Wu)（ROOOH）是(Shi)用(Yong)于(Yu)有(You)机(Ji)合(He)成(Cheng)的(De)强(Qiang)氧(Yang)化(Hua)剂(Ji)。此(Ci)前(Qian)，研(Yan)究(Jiu)推(Tui)测(Ce)它(Ta)们(Men)是(Shi)在(Zai)大(Da)气(Qi)中(Zhong)通(Tong)过(Guo)有(You)机(Ji)过(Guo)氧(Yang)自(Zi)由(You)基(Ji)（RO2）与(Yu)氢(Qing)氧(Yang)自(Zi)由(You)基(Ji)（OH）的(De)气(Qi)相(Xiang)反(Fan)应(Ying)形(Xing)成(Cheng)的(De)。在(Zai)此(Ci)，我(Wo)们(Men)报(Bao)告(Gao)了(Liao)从(Cong)几(Ji)个(Ge)大(Da)气(Qi)相(Xiang)关(Guan)的(De)RO2自(Zi)由(You)基(Ji)中(Zhong)直(Zhi)接(Jie)观(Guan)察(Cha)到(Dao)ROOOH的(De)形(Xing)成(Cheng)。动(Dong)力(Li)学(Xue)分(Fen)析(Xi)证(Zheng)实(Shi)RO2 + OH快(Kuai)速(Su)反(Fan)应(Ying)形(Xing)成(Cheng)ROOOH，速(Su)率(Lv)系(Xi)数(Shu)接(Jie)近(Jin)碰(Peng)撞(Zhuang)极(Ji)限(Xian)。对(Dui)于(Yu)氢(Qing)氧(Yang)自(Zi)由(You)基(Ji)引(Yin)发(Fa)的(De)异(Yi)戊(Wu)二(Er)烯(Xi)降(Jiang)解(Jie)，全(Quan)球(Qiu)模(Mo)型(Xing)预(Yu)测(Ce)三(San)氧(Yang)化(Hua)二(Er)氢(Qing)摩(Mo)尔(Er)生(Sheng)成(Cheng)率(Lv)高(Gao)达(Da)1%，这(Zhe)意(Yi)味(Wei)着(Zhuo)每(Mei)年(Nian)约(Yue)有(You)1000万(Wan)吨(Dun)的(De)ROOOH生(Sheng)成(Cheng)。ROOOH在(Zai)大(Da)气(Qi)中(Zhong)的(De)寿(Shou)命(Ming)预(Yu)计(Ji)为(Wei)几(Ji)分(Fen)钟(Zhong)到(Dao)几(Ji)小(Xiao)时(Shi)。氢(Qing)三(San)氧(Yang)化(Hua)物(Wu)是(Shi)大(Da)气(Qi)中(Zhong)先(Xian)前(Qian)被(Bei)忽(Hu)略(Lue)的(De)一(Yi)类(Lei)物(Wu)质(Zhi)，其(Qi)影(Ying)响(Xiang)需(Xu)要(Yao)进(Jin)一(Yi)步(Bu)研(Yan)究(Jiu)。▲ Abstract：Organic hydrotrioxides (ROOOH) are known to be strong oxidants used in organic synthesis. Previously, it has been speculated that they are formed in the atmosphere through the gas-phase reaction of organic peroxy radicals (RO2) with hydroxyl radicals (OH). Here, we report direct observation of ROOOH formation from several atmospherically relevant RO2 radicals. Kinetic analysis confirmed rapid RO2 + OH reactions forming ROOOH, with rate coefficients close to the collision limit. For the OH-initiated degradation of isoprene, global modeling predicts molar hydrotrioxide formation yields of up to 1%, which represents an annual ROOOH formation of about 10 million metric tons. The atmospheric lifetime of ROOOH is estimated to be minutes to hours. Hydrotrioxides represent a previously omitted substance class in the atmosphere, the impact of which needs to be examined.Dynamic interplay between metal nanoparticles and oxide support under redox conditions氧(Yang)化(Hua)还(Huan)原(Yuan)条(Tiao)件(Jian)下(Xia)金(Jin)属(Shu)纳(Na)米(Mi)粒(Li)子(Zi)和(He)氧(Yang)化(Hua)物(Wu)载(Zai)体(Ti)之(Zhi)间(Jian)的(De)动(Dong)态(Tai)相(Xiang)互(Hu)作(Zuo)用(Yong)▲ 作(Zuo)者(Zhe)：H. FREY, A. BECK, X. HUANG et al.▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abm3371▲ 摘(Zhai)要(Yao)：贵(Gui)金(Jin)属(Shu)颗(Ke)粒(Li)和(He)可(Ke)还(Huan)原(Yuan)金(Jin)属(Shu)氧(Yang)化(Hua)物(Wu)载(Zai)体(Ti)之(Zhi)间(Jian)的(De)动(Dong)态(Tai)相(Xiang)互(Hu)作(Zuo)用(Yong)依(Yi)赖(Lai)于(Yu)与(Yu)周(Zhou)围(Wei)气(Qi)体(Ti)的(De)氧(Yang)化(Hua)还(Huan)原(Yuan)反(Fan)应(Ying)。透(Tou)射(She)电(Dian)子(Zi)显(Xian)微(Wei)镜(Jing)显(Xian)示(Shi)，当(Dang)系(Xi)统(Tong)暴(Bao)露(Lu)在(Zai)含(Han)氧(Yang)和(He)氢(Qing)的(De)氧(Yang)化(Hua)还(Huan)原(Yuan)反(Fan)应(Ying)环(Huan)境(Jing)中(Zhong)，在(Zai)还(Huan)原(Yuan)条(Tiao)件(Jian)下(Xia)观(Guan)察(Cha)到(Dao)的(De)、包(Bao)裹(Guo)在(Zai)二(Er)氧(Yang)化(Hua)钛(Zuo)上(Shang)的(De)金(Jin)属(Shu)-载(Zai)体(Ti)强(Qiang)相(Xiang)互(Hu)作(Zuo)用(Yong)（SMSI）诱(You)导(Dao)的(De)铂(Bo)颗(Ke)粒(Li)在(Zai)1 bar 压(Ya)力(Li)下(Xia)消(Xiao)失(Shi)了(Liao)。金(Jin)属(Shu)氧(Yang)化(Hua)物(Wu)的(De)不(Bu)稳(Wen)定(Ding)和(He)氧(Yang)化(Hua)还(Huan)原(Yuan)介(Jie)导(Dao)的(De)二(Er)氧(Yang)化(Hua)钛(Zuo)重(Zhong)构(Gou)导(Dao)致(Zhi)了(Liao)依(Yi)赖(Lai)于(Yu)纳(Na)米(Mi)粒(Li)子(Zi)取(Qu)向(Xiang)的(De)粒(Li)子(Zi)动(Dong)力(Li)学(Xue)和(He)定(Ding)向(Xiang)迁(Qian)移(Yi)。当(Dang)转(Zhuan)回(Hui)纯(Chun)氧(Yang)化(Hua)条(Tiao)件(Jian)时(Shi)，SMSI静(Jing)态(Tai)状(Zhuang)态(Tai)被(Bei)重(Zhong)新(Xin)建(Jian)立(Li)。这(Zhe)项(Xiang)研(Yan)究(Jiu)强(Qiang)调(Diao)了(Liao)反(Fan)应(Ying)态(Tai)和(He)非(Fei)反(Fan)应(Ying)态(Tai)之(Zhi)间(Jian)的(De)差(Cha)异(Yi)，并(Bing)表(Biao)明(Ming)金(Jin)属(Shu)-载(Zai)体(Ti)相(Xiang)互(Hu)作(Zuo)用(Yong)的(De)表(Biao)现(Xian)强(Qiang)烈(Lie)地(Di)依(Yi)赖(Lai)于(Yu)化(Hua)学(Xue)环(Huan)境(Jing)。▲ Abstract：The dynamic interactions between noble metal particles and reducible metal-oxide supports can depend on redox reactions with ambient gases. Transmission electron microscopy revealed that the strong metal-support interaction (SMSI)–induced encapsulation of platinum particles on titania observed under reducing conditions is lost once the system is exposed to a redox-reactive environment containing oxygen and hydrogen at a total pressure of ~1 bar. Destabilization of the metal–oxide interface and redox-mediated reconstructions of titania lead to particle dynamics and directed particle migration that depend on nanoparticle orientation. A static encapsulated SMSI state was reestablished when switching back to purely oxidizing conditions. This work highlights the difference between reactive and nonreactive states and demonstrates that manifestations of the metal-support interaction strongly depend on the chemical environment.地(Di)球(Qiu)科(Ke)学(Xue)Earth SciencePersistent influence of precession on northern ice sheet variability since the early Pleistocene早(Zao)更(Geng)新(Xin)世(Shi)以(Yi)来(Lai)岁(Sui)差(Cha)对(Dui)北(Bei)部(Bu)冰(Bing)盖(Gai)变(Bian)化(Hua)的(De)持(Chi)续(Xu)影(Ying)响(Xiang)▲ 作(Zuo)者(Zhe)：STEPHEN BARKER, AIDAN STARR, JEROEN VAN DER LUBBE et al.▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abm4033▲ 摘(Zhai)要(Yao)：100万(Wan)年(Nian)前(Qian)，全(Quan)球(Qiu)冰(Bing)量(Liang)的(De)变(Bian)化(Hua)主(Zhu)要(Yao)是(Shi)倾(Qing)角(Jiao)的(De)变(Bian)化(Hua)；然(Ran)而(Er)，岁(Sui)差(Cha)产(Chan)生(Sheng)何(He)种(Zhong)作(Zuo)用(Yong)的(De)问(Wen)题(Ti)仍(Reng)然(Ran)没(Mei)有(You)解(Jie)决(Jue)。通(Tong)过(Guo)过(Guo)去(Qu)170万(Wan)年(Nian)的(De)北(Bei)大(Da)西(Xi)洋(Yang)冰(Bing)漂(Piao)流(Liu)记(Ji)录(Lu)，我(Wo)们(Men)发(Fa)现(Xian)特(Te)定(Ding)冰(Bing)川(Chuan)周(Zhou)期(Qi)（反(Fan)映(Ying)了(Liao)冰(Bing)盖(Gai)的(De)扩(Kuo)张(Zhang)）中(Zhong)冰(Bing)漂(Piao)流(Liu)起(Qi)始(Shi)通(Tong)常(Chang)持(Chi)续(Xu)在(Zai)倾(Qing)角(Jiao)较(Jiao)少(Shao)而(Er)大(Da)规(Gui)模(Mo)冰(Bing)消(Xiao)融(Rong)事(Shi)件(Jian)都(Du)与(Yu)岁(Sui)差(Cha)的(De)最(Zui)小(Xiao)值(Zhi)相(Xiang)关(Guan)。此(Ci)外(Wai)，我(Wo)们(Men)的(De)研(Yan)究(Jiu)结(Jie)果(Guo)表(Biao)明(Ming)，在(Zai)中(Zhong)-晚(Wan)更(Geng)新(Xin)世(Shi)时(Shi)期(Qi)，由(You)岁(Sui)差(Cha)驱(Qu)动(Dong)的(De)大(Da)规(Gui)模(Mo)消(Xiao)融(Rong)事(Shi)件(Jian)与(Yu)冰(Bing)消(Xiao)期(Qi)之(Zhi)间(Jian)普(Pu)遍(Bian)存(Cun)在(Zai)关(Guan)联(Lian)。在(Zai)增(Zeng)加(Jia)发(Fa)生(Sheng)前(Qian)，倾(Qing)角(Jiao)本(Ben)身(Shen)就(Jiu)足(Zu)以(Yi)结(Jie)束(Shu)一(Yi)次(Ci)冰(Bing)期(Qi)循(Xun)环(Huan)，在(Zai)约(Yue)100万(Wan)年(Nian)以(Yi)后(Hou)，随(Sui)着(Zhuo)北(Bei)半(Ban)球(Qiu)冰(Bing)原(Yuan)的(De)南(Nan)延(Yan)，倾(Qing)角(Jiao)失(Shi)去(Qu)了(Liao)对(Dui)冰(Bing)川(Chuan)消(Xiao)退(Tui)的(De)主(Zhu)导(Dao)作(Zuo)用(Yong)。▲ Abstract：Prior to ~1 million years ago (Ma), variations in global ice volume were dominated by changes in obliquity; however, the role of precession remains unresolved. Using a record of North Atlantic ice rafting spanning the past 1.7 million years, we find that the onset of ice rafting within a given glacial cycle (reflecting ice sheet expansion) consistently occurred during times of decreasing obliquity whereas mass ice wasting (ablation) events were consistently tied to minima in precession. Furthermore, our results suggest that the ubiquitous association between precession-driven mass wasting events and glacial termination is a distinct feature of the mid to late Pleistocene. Before then (increasing), obliquity alone was sufficient to end a glacial cycle, before losing its dominant grip on deglaciation with the southward extension of Northern Hemisphere ice sheets since ~1 Ma.Where rivers jump course河(He)流(Liu)“跳(Tiao)跃(Yue)”的(De)地(Di)方(Fang)▲ 作(Zuo)者(Zhe)：SAM BROOKE, AUSTIN J. CHADWICK, JOSE SILVESTRE et al.▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abm1215▲ 摘(Zhai)要(Yao)：在(Zai)罕(Han)见(Jian)的(De)河(He)流(Liu)冲(Chong)裂(Lie)事(Shi)件(Jian)中(Zhong)，河(He)流(Liu)会(Hui)突(Tu)然(Ran)改(Gai)道(Dao)，导(Dao)致(Zhi)灾(Zai)难(Nan)性(Xing)的(De)洪(Hong)水(Shui)。由(You)于(Yu)数(Shu)据(Ju)稀(Xi)少(Shao)，对(Dui)冲(Chong)裂(Lie)位(Wei)置(Zhi)的(De)控(Kong)制(Zhi)知(Zhi)之(Zhi)甚(Shen)少(Shao)。我(Wo)们(Men)分(Fen)析(Xi)了(Liao)近(Jin)50年(Nian)来(Lai)的(De)卫(Wei)星(Xing)图(Tu)像(Xiang)，并(Bing)记(Ji)录(Lu)了(Liao)全(Quan)球(Qiu)113起(Qi)冲(Chong)裂(Lie)事(Shi)件(Jian)，发(Fa)现(Xian)了(Liao)三(San)种(Zhong)不(Bu)同(Tong)的(De)冲(Chong)裂(Lie)位(Wei)置(Zhi)控(Kong)制(Zhi)。扇(Shan)体(Ti)的(De)冲(Chong)裂(Lie)作(Zuo)用(Yong)与(Yu)谷(Gu)限(Xian)变(Bian)化(Hua)相(Xiang)吻(Wen)合(He)，而(Er)三(San)角(Jiao)洲(Zhou)的(De)冲(Chong)裂(Lie)作(Zuo)用(Yong)主(Zhu)要(Yao)集(Ji)中(Zhong)在(Zai)回(Hui)水(Shui)带(Dai)内(Nei)，表(Biao)明(Ming)洪(Hong)水(Shui)期(Qi)间(Jian)受(Shou)空(Kong)间(Jian)流(Liu)的(De)减(Jian)速(Su)或(Huo)加(Jia)速(Su)控(Kong)制(Zhi)。然(Ran)而(Er)，三(San)角(Jiao)洲(Zhou)上(Shang)38%的(De)冲(Chong)裂(Lie)发(Fa)生(Sheng)在(Zai)回(Hui)水(Shui)效(Xiao)应(Ying)的(De)上(Shang)游(You)。这(Zhe)些(Xie)事(Shi)件(Jian)发(Fa)生(Sheng)在(Zai)热(Re)带(Dai)和(He)沙(Sha)漠(Mo)环(Huan)境(Jing)里(Li)陡(Dou)峭(Qiao)、富(Fu)含(Han)沉(Chen)积(Ji)物(Wu)的(De)河(He)流(Liu)中(Zhong)。我(Wo)们(Men)的(De)研(Yan)究(Jiu)结(Jie)果(Guo)表(Biao)明(Ming)，三(San)角(Jiao)洲(Zhou)上(Shang)的(De)冲(Chong)裂(Lie)位(Wei)置(Zhi)是(Shi)由(You)上(Shang)游(You)的(De)洪(Hong)水(Shui)侵(Qin)蚀(Shi)程(Cheng)度(Du)决(Jue)定(Ding)的(De)，这(Zhe)种(Zhong)侵(Qin)蚀(Shi)通(Tong)常(Chang)局(Ju)限(Xian)于(Yu)回(Hui)水(Shui)区(Qu)，但(Dan)在(Zai)陡(Dou)峭(Qiao)的(De)含(Han)沙(Sha)河(He)流(Liu)中(Zhong)可(Ke)以(Yi)向(Xiang)上(Shang)游(You)延(Yan)伸(Shen)。我(Wo)们(Men)的(De)研(Yan)究(Jiu)发(Fa)现(Xian)阐(Chan)明(Ming)了(Liao)冲(Chong)裂(Lie)灾(Zai)害(Hai)可(Ke)能(Neng)如(Ru)何(He)响(Xiang)应(Ying)土(Tu)地(Di)使(Shi)用(Yong)和(He)气(Qi)候(Hou)变(Bian)化(Hua)。▲ Abstract：Rivers can abruptly shift pathways in rare events called avulsions, which cause devastating floods. The controls on avulsion locations are poorly understood as a result of sparse data on such features. We analyzed nearly 50 years of satellite imagery and documented 113 avulsions across the globe that indicate three distinct controls on avulsion location. Avulsions on fans coincide with valley-confinement change, whereas avulsions on deltas are primarily clustered within the backwater zone, indicating a control by spatial flow deceleration or acceleration during floods. However, 38% of avulsions on deltas occurred upstream of backwater effects. These events occurred in steep, sediment-rich rivers in tropical and desert environments. Our results indicate that avulsion location on deltas is set by the upstream extent of flood-driven erosion, which is typically limited to the backwater zone but can extend far upstream in steep, sediment-laden rivers. Our findings elucidate how avulsion hazards might respond to land use and climate change.Models predict planned phosphorus load reduction will make Lake Erie more toxic模(Mo)型(Xing)预(Yu)测(Ce)计(Ji)划(Hua)中(Zhong)的(De)磷(Lin)负(Fu)荷(He)减(Jian)少(Shao)将(Jiang)使(Shi)伊(Yi)利(Li)湖(Hu)的(De)毒(Du)性(Xing)更(Geng)大(Da)▲ 作(Zuo)者(Zhe)：FERDI L. HELLWEGER, ROBBIE M. MARTIN, FALK EIGEMANN et al.▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abm6791▲ 摘(Zhai)要(Yao)：有(You)害(Hai)的(De)蓝(Lan)藻(Zao)菌(Jun)是(Shi)一(Yi)个(Ge)全(Quan)球(Qiu)性(Xing)的(De)环(Huan)境(Jing)问(Wen)题(Ti)，但(Dan)我(Wo)们(Men)缺(Que)乏(Fa)对(Dui)有(You)毒(Du)与(Yu)非(Fei)有(You)毒(Du)的(De)菌(Jun)株(Zhu)生(Sheng)态(Tai)和(He)毒(Du)素(Su)生(Sheng)产(Chan)的(De)可(Ke)操(Cao)作(Zuo)的(De)了(Liao)解(Jie)。我(Wo)们(Men)进(Jin)行(Xing)了(Liao)一(Yi)项(Xiang)包(Bao)含(Han)103篇(Pian)论(Lun)文(Wen)的(De)大(Da)规(Gui)模(Mo)荟(Zuo)萃(Zuo)分(Fen)析(Xi)，并(Bing)利(Li)用(Yong)它(Ta)开(Kai)发(Fa)了(Liao)一(Yi)个(Ge)微(Wei)囊(Nang)藻(Zao)生(Sheng)长(Chang)和(He)微(Wei)囊(Nang)藻(Zao)毒(Du)素(Su)产(Chan)生(Sheng)的(De)机(Ji)械(Xie)性(Xing)代(Dai)理(Li)人(Ren)基(Ji)模(Mo)型(Xing)。对(Dui)伊(Yi)利(Li)湖(Hu)的(De)模(Mo)拟(Ni)表(Biao)明(Ming)，在(Zai)2014年(Nian)托(Tuo)莱(Lai)多(Duo)饮(Yin)用(Yong)水(Shui)危(Wei)机(Ji)期(Qi)间(Jian)，观(Guan)察(Cha)到(Dao)的(De)产(Chan)毒(Du)素(Su)到(Dao)非(Fei)产(Chan)毒(Du)素(Su)的(De)菌(Jun)株(Zhu)演(Yan)替(Ti)是(Shi)由(You)不(Bu)同(Tong)的(De)细(Xi)胞(Bao)氧(Yang)化(Hua)应(Ying)激(Ji)缓(Huan)解(Jie)策(Ce)略(Lue)（微(Wei)囊(Nang)藻(Zao)毒(Du)素(Su)保(Bao)护(Hu)vs酶(Mei)降(Jiang)解(Jie)）和(He)这(Zhe)些(Xie)机(Ji)制(Zhi)对(Dui)氮(Dan)的(De)不(Bu)同(Tong)易(Yi)感(Gan)度(Du)所(Suo)控(Kong)制(Zhi)的(De)。这(Zhe)个(Ge)模(Mo)型(Xing)以(Yi)及(Ji)一(Yi)个(Ge)更(Geng)简(Jian)单(Dan)的(De)经(Jing)验(Yan)模(Mo)型(Xing)，都(Du)预(Yu)测(Ce)计(Ji)划(Hua)中(Zhong)的(De)磷(Lin)负(Fu)荷(He)减(Jian)少(Shao)将(Jiang)降(Jiang)低(Di)生(Sheng)物(Wu)量(Liang)，但(Dan)使(Shi)氮(Dan)和(He)光(Guang)更(Geng)容(Rong)易(Yi)获(Huo)得(De)，这(Zhe)将(Jiang)增(Zeng)加(Jia)毒(Du)素(Su)的(De)产(Chan)生(Sheng)，有(You)利(Li)于(Yu)产(Chan)毒(Du)细(Xi)胞(Bao)，并(Bing)增(Zeng)加(Jia)毒(Du)素(Su)浓(Nong)度(Du)。▲ Abstract：Harmful cyanobacteria are a global environmental problem, yet we lack actionable understanding of toxigenic versus nontoxigenic strain ecology and toxin production. We performed a large-scale meta-analysis including 103 papers and used it to develop a mechanistic, agent-based model of Microcystis growth and microcystin production. Simulations for Lake Erie suggest that the observed toxigenic-to-nontoxigenic strain succession during the 2014 Toledo drinking water crisis was controlled by different cellular oxidative stress mitigation strategies (protection by microcystin versus degradation by enzymes) and the different susceptibility of those mechanisms to nitrogen limitation. This model, as well as a simpler empirical one, predicts that the planned phosphorus load reduction will lower biomass but make nitrogen and light more available, which will increase toxin production, favor toxigenic cells, and increase toxin concentrations.
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王楠总是简短地回答："还行没什么需要帮忙的"