秋葵芭蕉绿巨人丝瓜草莓颈翱厂一站式,网友:很稳定-小影志绿巨人浩克冲电影冲哔哩哔哩
达拉斯独行侠布兰登-威廉姆斯21分4板5助2断，劳森16分8板1助1断1帽，梅尔文·阿金萨13分5板1助1断1帽；
2025年01月05日，据当事人陈述，当时自己准备靠边停车，踩制动踏板时发现很硬，踩不下去，无法停车，按下笔档也没有反应，只好继续往前行驶，向左打方向。不料车辆驶上水泥路面后突然加速，中途猛踩刹车但毫无作用。交警排除酒驾、毒驾情况。对于此次事故发生的原因，车主认为是特斯拉刹车失灵导致的，但特斯拉客服回应称车主全程没有踩下刹车的动作：车辆电门被长期深度踩下，并一度保持100%；全程没有踩下刹车的动作；驾驶期间驾驶员四次短暂按下笔档按钮，又快速松开，同时制动灯也快速点亮并熄灭。在双方各执一词中，这起车辆失控事故的责任方到底是谁，至今尚未有定论。
秋葵芭蕉绿巨人丝瓜草莓颈翱厂一站式,网友:很稳定-小影志绿巨人浩克冲电影冲哔哩哔哩
静等大鱼上钩
夏季是溺水事故高发期也就是说，无论是公中的产业，还是徐太夫人的嫁妆，早都已经分了。
zhuanjizhiyi，qushizifadejiupianliliang。zaiyigezhongchangqikanduoxiangshangdezhouqizhong，duanqihuidiaoyueduo，xiufuxiangshangdedanlijiuyueda。jingquedefanzhuanshidiansuiranwufayuce，danmeiduoxiadieyigedian，jiuhuiduojixuyidianfandanxiangshangdeliliang。32 daxiangxinzangdedaxiaorangrengandaojingya，tamendeshentizhipangdaxuyaoruciqiangdadexinzanglaizhichengshengmingdeliliang，rangrenbujinduidaziranchongmanjingweizhiqing。
少(厂丑补辞)女(狈惫)闺(骋耻颈)房(贵补苍驳)写(齿颈别)真(窜丑别苍)，总(窜辞苍驳)有(驰辞耻)秘(惭颈)密(惭颈)属(厂丑耻)于(驰耻)自(窜颈)己(闯颈)
youbinggeifumukanB，fumuxingdongbubianliao，womenyaozaifumugenqian，duanchadaoshui，chihelasa，yidingyaoxiaoxin，xixin，zhoudaodesihou。huaweiNova2yuOPPOR11,nabugengzhidenianqingrenyongyou？2017-05-11 17:42·xiaofeijiaodianqianjitian，huaweiNova2heOPPOR11shoujideyixiejibenxinxibeipuguangliao，liangkuandudingweizhongduan，bulunshipeizhihuanshiyanzhidumianxiangdeshinianqingren。bijingjugaokaohuanyoubudaoyigeyuedeshijianliao，gaokaoguohoujiangyonglaiyidabohuanjichao，xueshengdangwan《wangzherongyao》deyuwangyejiangbeichedishifang。namezheliangkuannagegengshihezijine？lanlvdajunyizhizoudeshiqingpeizhierzhongpaizhao、yinledeluxian。raner，jinnianlainianqingren，youqishimeizimenyemishangliaowan《wangzherongyao》，xiangbiOPPOxiudaoliaoshichangdebianhuaerquyinghenianqingrendexuqiu，xinqijianOPPOR11jiangcaiyongshoufadezuolong660。gaixinpiandexingnengyuqijianxinpianzuolong835xiangchabingbushitaiduo，bingqiexuanzezuolong660keyibaozhengzugoudechanneng。erqiezhekuanxinpianduiyuwan《wangzherongyao》laishuohaowuyali。lingwai，OPPO R11jianghuicaiyong5.5yingcun1080pxianshiping，4Gdaneicun，qianhoushuang2000wanshexiangtou，zhichi5V/4Akuaichongjishu，waiguanshangcaiyongyuiPhone 7xiangtongdezuodingshitianxiansheji，yupingguo7zaiwaiguanshangfeichangxiangsi。paizhaoduiyuzhekuanshoujilaishuoyiranshiyigeyoushi，zheduiyuxiaizipaibingqiexihuanwanyouxidexiaofeizhelaishuojianzhishiyigefuyin。zhekuanshoujiyouwangzai5yue15rifabu，qijiageyehuizai2、3qianyuanzuoyou。weiliaozhengduonianqingxiaofeizheshichang，huaweiyeshishewoqishui。huaweideliangkuanxinjihuaweiNova2heNova2 plusyejiangzaibenyuexiaxunfabu。huaweidezheliangkuanshoujiyeshipeibeizuolong660，fenbieshiyongliao5.1yingcunhe5.5yingcun1080Ppingmu，dazaizuozuo660chuliqi，fuyi4+64Gneicun。zaiwaiguanshang，yeshicaiyongzhuliudesheji。gengzhongyaodeshizhekuanshoujiyeshicaiyongshuangshexiangtou，buguohouzhishi1200wanxiangsushexiangtou，qianzhi800wanxiangsushexiangtou。huaweizheliangkuanshoujidejiageyejianghuishi2000duoyuan，buguohuibioppodeshoujibianyijibaiyuan。huaweiNova2yuOPPOR11，bulunshipeizhi、yanzhi、jiageduchabuduo，buguoOPPOR11zaiyanzhihepaizhaofangmianzhanyouyoushi，erzaijiageshangmianbuzhanyoushi。erhuaweiNova2suiranzaipaizhao、yanzhifangmianburuOPPO，danshijiageyoushishiOPPOwufabinide。（kejiMBA——shouximeitiguanqixiademeiti）
《科(Ke)学(Xue)》（20211126出(Chu)版(Ban)）一(Yi)周(Zhou)论(Lun)文(Wen)导(Dao)读(Du)2021-11-28 20:23·科(Ke)学(Xue)网(Wang)编(Bian)译(Yi)｜冯(Feng)维(Wei)维(Wei)Science, 26 NOVEMBER 2021, VOL 374, ISSUE 6571《科(Ke)学(Xue)》2021年(Nian)11月(Yue)26日(Ri)，第(Di)374卷(Juan)，6571期(Qi)物(Wu)理(Li)学(Xue)PhysicsDirect visualization of magnetic domains and moiré magnetism in twisted 2D magnets在(Zai)扭(Niu)曲(Qu)的(De)二(Er)维(Wei)磁(Ci)体(Ti)中(Zhong)磁(Ci)畴(Chou)和(He)moiré磁(Ci)性(Xing)的(De)直(Zhi)接(Jie)可(Ke)视(Shi)化(Hua)▲ 作(Zuo)者(Zhe)：TIANCHENG SONG, QI-CHAO SUN, ERIC ANDERSON, CHONG WANGJIMIN QIANTAKASHI TANIGUCHI, KENJI WATANABE, MICHAEL A. MCGUIR, RAINER ST?HR, XIAODONG XU▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abj7478▲ 摘(Zhai)要(Yao)石(Shi)墨(Mo)烯(Xi)的(De)单(Dan)分(Fen)子(Zi)扭(Niu)转(Zhuan)层(Ceng)导(Dao)致(Zhi)了(Liao)许(Xu)多(Duo)不(Bu)寻(Xun)常(Chang)的(De)相(Xiang)关(Guan)状(Zhuang)态(Tai)。这(Zhe)种(Zhong)方(Fang)法(Fa)激(Ji)发(Fa)了(Liao)研(Yan)究(Jiu)人(Ren)员(Yuan)尝(Chang)试(Shi)扭(Niu)转(Zhuan)二(Er)维(Wei)磁(Ci)铁(Tie)，但(Dan)这(Zhe)种(Zhong)实(Shi)验(Yan)被(Bei)证(Zheng)明(Ming)是(Shi)一(Yi)个(Ge)艰(Jian)巨(Ju)的(De)挑(Tiao)战(Zhan)。作(Zuo)者(Zhe)用(Yong)小(Xiao)扭(Niu)曲(Qu)角(Jiao)的(De)二(Er)维(Wei)磁(Ci)铁(Tie)三(San)碘(Dian)化(Hua)铬(Ge)层(Ceng)制(Zhi)作(Zuo)了(Liao)结(Jie)构(Gou)。利(Li)用(Yong)金(Jin)刚(Gang)石(Shi)中(Zhong)的(De)氮(Dan)空(Kong)位(Wei)中(Zhong)心(Xin)作(Zuo)为(Wei)磁(Ci)强(Qiang)计(Ji)，对(Dui)扭(Niu)曲(Qu)单(Dan)层(Ceng)结(Jie)构(Gou)和(He)扭(Niu)曲(Qu)三(San)层(Ceng)结(Jie)构(Gou)的(De)磁(Ci)畴(Chou)进(Jin)行(Xing)了(Liao)成(Cheng)像(Xiang)。发(Fa)现(Xian)了(Liao)扭(Niu)曲(Qu)三(San)层(Ceng)薄(Bao)膜(Mo)的(De)铁(Tie)磁(Ci)和(He)反(Fan)铁(Tie)磁(Ci)畴(Chou)的(De)周(Zhou)期(Qi)性(Xing)模(Mo)式(Shi)。▲ AbstractTwisting monolayers of graphene with respect to each other has led to a number of unusual correlated states. This approach has inspired researchers to try their hand at twisting two-dimensional (2D) magnets, but such experiments have proven a difficult challenge. Song et al. made structures out of layers of the 2D magnet chromium triiodide with a small twist angle (see the Perspective by Lado). Using nitrogen vacancy centers in diamond as a magnetometer, the authors imaged the magnetic domains in both twisted monolayer and twisted trilayer structures. For twisted trilayers, a periodic pattern of ferromagnetic and antiferromagnetic domains was revealed.Floquet Hamiltonian engineering of an isolated many-body spin system孤(Gu)立(Li)多(Duo)体(Ti)自(Zi)旋(Xuan)系(Xi)统(Tong)的(De)弗(Fu)洛(Luo)奎(Kui)特(Te)哈(Ha)密(Mi)顿(Dun)工(Gong)程(Cheng)▲ 作(Zuo)者(Zhe)：SEBASTIAN GEIER, NITHIWADEE THAICHAROEN, CL?MENT HAINAUT, TITUS FRANZ, ANDRE SALZINGER, XANNIKA TEBBEN, DAVID GRIMSHANDL, GERHARD Z?RN, AND MATTHIAS WEIDEM?LLER▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abd9547▲ 摘(Zhai)要(Yao)控(Kong)制(Zhi)相(Xiang)互(Hu)作(Zuo)用(Yong)是(Shi)多(Duo)体(Ti)系(Xi)统(Tong)量(Liang)子(Zi)工(Gong)程(Cheng)的(De)关(Guan)键(Jian)要(Yao)素(Su)。利(Li)用(Yong)时(Shi)间(Jian)周(Zhou)期(Qi)驱(Qu)动(Dong)，一(Yi)个(Ge)封(Feng)闭(Bi)量(Liang)子(Zi)系(Xi)统(Tong)的(De)自(Zi)然(Ran)给(Gei)定(Ding)的(De)多(Duo)体(Ti)哈(Ha)密(Mi)顿(Dun)量(Liang)可(Ke)以(Yi)转(Zhuan)化(Hua)为(Wei)一(Yi)个(Ge)表(Biao)现(Xian)出(Chu)极(Ji)大(Da)不(Bu)同(Tong)动(Dong)力(Li)学(Xue)特(Te)性(Xing)的(De)有(You)效(Xiao)目(Mu)标(Biao)哈(Ha)密(Mi)顿(Dun)量(Liang)。作(Zuo)者(Zhe)在(Zai)超(Chao)冷(Leng)的(De)原(Yuan)子(Zi)气(Qi)体(Ti)中(Zhong)用(Yong)里(Li)德(De)堡(Bao)态(Tai)代(Dai)表(Biao)的(De)自(Zi)旋(Xuan)系(Xi)统(Tong)来(Lai)演(Yan)示(Shi)弗(Fu)洛(Luo)奎(Kui)特(Te)工(Gong)程(Cheng)。通(Tong)过(Guo)应(Ying)用(Yong)一(Yi)系(Xi)列(Lie)自(Zi)旋(Xuan)操(Cao)作(Zuo)，他(Ta)们(Men)改(Gai)变(Bian)了(Liao)有(You)效(Xiao)海(Hai)森(Sen)堡(Bao)XYZ哈(Ha)密(Mi)顿(Dun)量(Liang)的(De)对(Dui)称(Cheng)性(Xing)。因(Yin)此(Ci)，总(Zong)自(Zi)旋(Xuan)的(De)松(Song)弛(Chi)行(Xing)为(Wei)被(Bei)极(Ji)大(Da)地(Di)改(Gai)变(Bian)了(Liao)。观(Guan)测(Ce)到(Dao)的(De)动(Dong)力(Li)学(Xue)可(Ke)以(Yi)用(Yong)半(Ban)经(Jing)典(Dian)模(Mo)拟(Ni)来(Lai)定(Ding)性(Xing)地(Di)捕(Bo)捉(Zhuo)。设(She)计(Ji)广(Guang)泛(Fan)的(De)哈(Ha)密(Mi)顿(Dun)量(Liang)为(Wei)在(Zai)单(Dan)一(Yi)的(De)实(Shi)验(Yan)设(She)置(Zhi)中(Zhong)实(Shi)现(Xian)非(Fei)平(Ping)衡(Heng)动(Dong)力(Li)学(Xue)的(De)量(Liang)子(Zi)模(Mo)拟(Ni)提(Ti)供(Gong)了(Liao)巨(Ju)大(Da)的(De)机(Ji)会(Hui)。▲ AbstractControlling interactions is the key element for the quantum engineering of many-body systems. Using time-periodic driving, a naturally given many-body Hamiltonian of a closed quantum system can be transformed into an effective target Hamiltonian that exhibits vastly different dynamics. We demonstrate such Floquet engineering with a system of spins represented by Rydberg states in an ultracold atomic gas. By applying a sequence of spin manipulations, we change the symmetry properties of the effective Heisenberg XYZ Hamiltonian. As a consequence, the relaxation behavior of the total spin is drastically modified. The observed dynamics can be qualitatively captured by a semiclassical simulation. Engineering a wide range of Hamiltonians opens vast opportunities for implementing quantum simulation of nonequilibrium dynamics in a single experimental setting.化(Hua)学(Xue)ChemistryAccelerated dinuclear palladium catalyst identification through unsupervised machine learning通(Tong)过(Guo)无(Wu)监(Jian)督(Du)机(Ji)器(Qi)学(Xue)习(Xi)加(Jia)速(Su)双(Shuang)核(He)钯(Zuo)催(Cui)化(Hua)剂(Ji)识(Shi)别(Bie)▲ 作(Zuo)者(Zhe)：JULIAN A. HUEFFEL, THERESA SPERGER, IGNACIO FUNES-ARDOIZ, JAS S. WARD, KARI RISSANEN AND FRANZISKA SCHOENEBECK▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abj0999▲ 摘(Zhai)要(Yao)机(Ji)器(Qi)学(Xue)习(Xi)在(Zai)加(Jia)速(Su)同(Tong)质(Zhi)催(Cui)化(Hua)的(De)发(Fa)展(Zhan)方(Fang)面(Mian)具(Ju)有(You)巨(Ju)大(Da)潜(Qian)力(Li)，但(Dan)频(Pin)繁(Fan)地(Di)需(Xu)要(Yao)大(Da)量(Liang)的(De)实(Shi)验(Yan)数(Shu)据(Ju)可(Ke)能(Neng)成(Cheng)为(Wei)瓶(Ping)颈(Jing)。作(Zuo)者(Zhe)报(Bao)告(Gao)了(Liao)一(Yi)个(Ge)无(Wu)监(Jian)督(Du)机(Ji)器(Qi)学(Xue)习(Xi)工(Gong)作(Zuo)流(Liu)，只(Zhi)使(Shi)用(Yong)了(Liao)5个(Ge)实(Shi)验(Yan)数(Shu)据(Ju)点(Dian)。它(Ta)利(Li)用(Yong)了(Liao)广(Guang)义(Yi)参(Can)数(Shu)数(Shu)据(Ju)库(Ku)，并(Bing)辅(Fu)以(Yi)在(Zai)硅(Gui)数(Shu)据(Ju)采(Cai)集(Ji)和(He)聚(Ju)类(Lei)中(Zhong)针(Zhen)对(Dui)特(Te)定(Ding)问(Wen)题(Ti)的(De)数(Shu)据(Ju)库(Ku)。他(Ta)们(Men)展(Zhan)示(Shi)了(Liao)该(Gai)策(Ce)略(Lue)在(Zai)钯(Zuo)（Pd）催(Cui)化(Hua)剂(Ji)形(Xing)态(Tai)形(Xing)成(Cheng)的(De)挑(Tiao)战(Zhan)性(Xing)问(Wen)题(Ti)上(Shang)的(De)力(Li)量(Liang)，目(Mu)前(Qian)缺(Que)乏(Fa)一(Yi)个(Ge)机(Ji)械(Xie)原(Yuan)理(Li)。从(Cong)348个(Ge)配(Pei)体(Ti)的(De)总(Zong)空(Kong)间(Jian)中(Zhong)，该(Gai)算(Suan)法(Fa)预(Yu)测(Ce)并(Bing)通(Tong)过(Guo)实(Shi)验(Yan)验(Yan)证(Zheng)了(Liao)一(Yi)些(Xie)膦(Zuo)配(Pei)体(Ti)（包(Bao)括(Kuo)以(Yi)前(Qian)从(Cong)未(Wei)合(He)成(Cheng)的(De)配(Pei)体(Ti))，它(Ta)们(Men)在(Zai)更(Geng)常(Chang)见(Jian)的(De)Pd（0）和(He)Pd（II）物(Wu)种(Zhong)上(Shang)产(Chan)生(Sheng)双(Shuang)核(He)Pd（I）配(Pei)合(He)物(Wu)。▲ AbstractAlthough machine learning bears enormous potential to accelerate developments in homogeneous catalysis, the frequent need for extensive experimental data can be a bottleneck for implementation. Here, we report an unsupervised machine learning workflow that uses only five experimental data points. It makes use of generalized parameter databases that are complemented with problem-specific in silico data acquisition and clustering. We showcase the power of this strategy for the challenging problem of speciation of palladium (Pd) catalysts, for which a mechanistic rationale is currently lacking. From a total space of 348 ligands, the algorithm predicted, and we experimentally verified, a number of phosphine ligands (including previously never synthesized ones) that give dinuclear Pd(I) complexes over the more common Pd(0) and Pd(II) species.Orbiting resonances in formaldehyde reveal coupling of roaming, radical, and molecular channels甲(Jia)醛(Quan)轨(Gui)道(Dao)共(Gong)振(Zhen)揭(Jie)示(Shi)漫(Man)游(You)、自(Zi)由(You)基(Ji)和(He)分(Fen)子(Zi)通(Tong)道(Dao)的(De)耦(Zuo)合(He)▲ 作(Zuo)者(Zhe)：CASEY D. FOLEY, CHANGJIAN XIE, HUA GUO, AND ARTHUR G. SUITS▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abk0634▲ 摘(Zhai)要(Yao)漫(Man)游(You)化(Hua)学(Xue)反(Fan)应(Ying)机(Ji)制(Zhi)是(Shi)指(Zhi)受(Shou)电(Dian)分(Fen)子(Zi)对(Dui)自(Zi)由(You)基(Ji)的(De)接(Jie)近(Jin)解(Jie)离(Li)，在(Zai)较(Jiao)长(Chang)距(Ju)离(Li)重(Zhong)新(Xin)定(Ding)向(Xiang)后(Hou)发(Fa)生(Sheng)分(Fen)子(Zi)内(Nei)反(Fan)应(Ying)。令(Ling)人(Ren)惊(Jing)讶(Ya)的(De)是(Shi)，尽(Jin)管(Guan)漫(Man)游(You)事(Shi)件(Jian)具(Ju)有(You)量(Liang)子(Zi)性(Xing)质(Zhi)，但(Dan)到(Dao)目(Mu)前(Qian)为(Wei)止(Zhi)还(Huan)没(Mei)有(You)观(Guan)察(Cha)到(Dao)清(Qing)晰(Xi)的(De)漫(Man)游(You)量(Liang)子(Zi)特(Te)征(Zheng)。作(Zuo)者(Zhe)在(Zai)漫(Man)游(You)阈(Zuo)值(Zhi)附(Fu)近(Jin)发(Fa)现(Xian)了(Liao)甲(Jia)醛(Quan)光(Guang)解(Jie)离(Li)的(De)量(Liang)子(Zi)动(Dong)力(Li)学(Xue)证(Zheng)据(Ju)。这(Zhe)归(Gui)因(Yin)于(Yu)与(Yu)H+HCO（Ka = 1）相(Xiang)关(Guan)的(De)共(Gong)振(Zhen)，它(Ta)对(Dui)CO的(De)旋(Xuan)转(Zhuan)和(He)平(Ping)动(Dong)能(Neng)量(Liang)分(Fen)布(Bu)有(You)深(Shen)刻(Ke)的(De)影(Ying)响(Xiang)，并(Bing)导(Dao)致(Zhi)漫(Man)游(You)分(Fen)数(Shu)在(Zai)10厘(Li)米(Mi)- 1的(De)能(Neng)量(Liang)范(Fan)围(Wei)内(Nei)变(Bian)化(Hua)了(Liao)2倍(Bei)。漫(Man)游(You)路(Lu)径(Jing)用(Yong)于(Yu)调(Diao)节(Jie)和(He)报(Bao)道(Dao)受(Shou)激(Ji)分(Fen)子(Zi)衰(Shuai)变(Bian)成(Cheng)产(Chan)物(Wu)时(Shi)复(Fu)杂(Za)的(De)振(Zhen)动(Dong)动(Dong)力(Li)学(Xue)和(He)三(San)种(Zhong)解(Jie)离(Li)路(Lu)径(Jing)之(Zhi)间(Jian)的(De)耦(Zuo)合(He)。▲ AbstractThe roaming chemical reaction mechanism involves near-dissociation of an energized molecule to radicals that leads instead to intramolecular reaction after reorientation at long range. Surprisingly, no clear quantum signatures of roaming have been observed to date, despite the quantum nature of the roaming event. We found evidence of quantum dynamics in the photodissociation of formaldehyde near the roaming threshold. This is ascribed to resonances associated to H+HCO(Ka = 1) that have a profound impact on the CO rotational and translational energy distributions and cause the roaming fraction to vary by a factor of 2 over an energy range of 10 cm–1. The roaming pathway serves both to modulate and report on the complex vibrational dynamics and coupling among the three dissociation pathways in the excited molecule as it decays to products.地(Di)质(Zhi)和(He)生(Sheng)物(Wu)Geology & biologyGlobal response of fire activity to late Quaternary grazer extinctions野(Ye)火(Huo)对(Dui)晚(Wan)第(Di)四(Si)纪(Ji)食(Shi)草(Cao)动(Dong)物(Wu)灭(Mie)绝(Jue)的(De)全(Quan)球(Qiu)响(Xiang)应(Ying)▲ 作(Zuo)者(Zhe)：ALLISON T. KARP, X J. TYLER FAITH, JENNIFER R. MARLONAND A. CARLA STAVER▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abj7478▲ 摘(Zhai)要(Yao)众(Zhong)所(Suo)周(Zhou)知(Zhi)，草(Cao)原(Yuan)食(Shi)草(Cao)动(Dong)物(Wu)通(Tong)过(Guo)消(Xiao)耗(Hao)可(Ke)能(Neng)易(Yi)燃(Ran)的(De)物(Wu)质(Zhi)，在(Zai)限(Xian)制(Zhi)野(Ye)火(Huo)方(Fang)面(Mian)发(Fa)挥(Hui)着(Zhuo)作(Zuo)用(Yong)。作(Zuo)者(Zhe)提(Ti)出(Chu)的(De)证(Zheng)据(Ju)表(Biao)明(Ming)，食(Shi)草(Cao)动(Dong)物(Wu)-火(Huo)的(De)相(Xiang)互(Hu)作(Zuo)用(Yong)在(Zai)过(Guo)去(Qu)影(Ying)响(Xiang)了(Liao)全(Quan)球(Qiu)范(Fan)围(Wei)内(Nei)的(De)火(Huo)。他(Ta)们(Men)将(Jiang)晚(Wan)第(Di)四(Si)纪(Ji)大(Da)陆(Lu)层(Ceng)面(Mian)巨(Ju)型(Xing)草(Cao)食(Shi)动(Dong)物(Wu)灭(Mie)绝(Jue)的(De)严(Yan)重(Zhong)程(Cheng)度(Du)与(Yu)草(Cao)食(Shi)生(Sheng)物(Wu)群(Qun)落(Luo)沉(Chen)积(Ji)木(Mu)炭(Tan)数(Shu)据(Ju)计(Ji)算(Suan)出(Chu)的(De)古(Gu)火(Huo)活(Huo)动(Dong)变(Bian)化(Hua)进(Jin)行(Xing)了(Liao)比(Bi)较(Jiao)。不(Bu)同(Tong)大(Da)陆(Lu)的(De)物(Wu)种(Zhong)灭(Mie)绝(Jue)程(Cheng)度(Du)不(Bu)同(Tong)，这(Zhe)种(Zhong)模(Mo)式(Shi)反(Fan)映(Ying)在(Zai)火(Huo)灾(Zai)活(Huo)动(Dong)的(De)变(Bian)化(Hua)上(Shang)。在(Zai)大(Da)型(Xing)食(Shi)草(Cao)动(Dong)物(Wu)灭(Mie)绝(Jue)最(Zui)严(Yan)重(Zhong)的(De)地(Di)方(Fang)（南(Nan)美(Mei)洲(Zhou)）和(He)灭(Mie)绝(Jue)发(Fa)生(Sheng)最(Zui)少(Shao)的(De)地(Di)方(Fang)（非(Fei)洲(Zhou)），火(Huo)灾(Zai)频(Pin)率(Lv)增(Zeng)加(Jia)最(Zui)多(Duo)。大(Da)型(Xing)食(Shi)草(Cao)动(Dong)物(Wu)在(Zai)第(Di)四(Si)纪(Ji)的(De)消(Xiao)失(Shi)极(Ji)大(Da)地(Di)改(Gai)变(Bian)了(Liao)全(Quan)球(Qiu)的(De)野(Ye)火(Huo)状(Zhuang)况(Kuang)。▲ AbstractGrassland herbivores are known to play a role in limiting wildfires by consuming potentially flammable material. Karp et al. present evidence that that herbivore-fire interactions affected fire on a global scale in the past. They compared the severity of late Quaternary continent-level megaherbivore extinctions with changes in paleofire activity calculated from sedimentary charcoal data from grassy biomes. The extent of extinctions varied between continents, and this pattern was reflected in the changes in fire activity. Fire frequency increased most where the megaherbivore extinctions were greatest (South America) and least where few extinctions occurred (Africa). This loss of large-bodied grazers in the Quaternary drastically altered global fire regimes.Adaptive evolution of flight in Morpho butterflies大(Da)闪(Shan)蝶(Die)飞(Fei)行(Xing)的(De)适(Shi)应(Ying)性(Xing)进(Jin)化(Hua)▲ 作(Zuo)者(Zhe)：CAMILLE LE ROY, DARIO AMADORISAMUEL CHARBERETJAAP WINDTFLORIAN T. MUIJRES , VIOLAINE LLAURENS AND VINCENT DEBAT▲ 链(Lian)接(Jie)：https://www.science.org/doi/10.1126/science.abh2620▲ 摘(Zhai)要(Yao)森(Sen)林(Lin)通(Tong)常(Chang)是(Shi)拥(Yong)挤(Ji)和(He)复(Fu)杂(Za)的(De)，给(Gei)在(Zai)其(Qi)中(Zhong)飞(Fei)行(Xing)的(De)物(Wu)种(Zhong)带(Dai)来(Lai)了(Liao)无(Wu)数(Shu)和(He)各(Ge)种(Zhong)各(Ge)样(Yang)的(De)挑(Tiao)战(Zhan)。作(Zuo)者(Zhe)观(Guan)察(Cha)了(Liao)亚(Ya)马(Ma)逊(Xun)大(Da)闪(Shan)蝶(Die)群(Qun)体(Ti)，发(Fa)现(Xian)在(Zai)形(Xing)态(Tai)和(He)行(Xing)为(Wei)方(Fang)面(Mian)，占(Zhan)据(Ju)冠(Guan)层(Ceng)的(De)物(Wu)种(Zhong)与(Yu)占(Zhan)据(Ju)林(Lin)下(Xia)植(Zhi)被(Bei)的(De)物(Wu)种(Zhong)存(Cun)在(Zai)差(Cha)异(Yi)。那(Na)些(Xie)进(Jin)化(Hua)到(Dao)占(Zhan)据(Ju)冠(Guan)层(Ceng)的(De)物(Wu)种(Zhong)，由(You)于(Yu)翅(Chi)膀(Bang)形(Xing)状(Zhuang)和(He)飞(Fei)行(Xing)行(Xing)为(Wei)的(De)结(Jie)合(He)，它(Ta)们(Men)的(De)滑(Hua)翔(Xiang)能(Neng)力(Li)有(You)所(Suo)提(Ti)高(Gao)。这(Zhe)些(Xie)特(Te)征(Zheng)的(De)组(Zu)合(He)在(Zai)不(Bu)同(Tong)的(De)物(Wu)种(Zhong)中(Zhong)是(Shi)不(Bu)同(Tong)的(De)，甚(Shen)至(Zhi)在(Zai)这(Zhe)个(Ge)单(Dan)一(Yi)的(De)属(Shu)中(Zhong)，这(Zhe)表(Biao)明(Ming)没(Mei)有(You)一(Yi)条(Tiao)路(Lu)径(Jing)导(Dao)致(Zhi)了(Liao)这(Zhe)片(Pian)森(Sen)林(Lin)的(De)殖(Zhi)民(Min)。▲ AbstractForests are often crowded and complex, presenting numerous and varied challenges for species flying through them. Le Roy et al. looked at the Amazonian Morpho butterfly group and found differences in both morphological and behavioral perspectives across species that occupy the canopy relative the understory. Species that evolved to occupy the canopy have improved gliding abilities because of a combination of wing shape and flight behavior. The combination of these traits varied across species even within this single genus, which suggests that there was not one route that led to colonization of this part of the forest.
有的人可能是第一次听说这个词，还不知道什么意思，我们简单的解释一下。从小到大，她基本上都是跟奶奶相依为命秋葵芭蕉绿巨人丝瓜草莓颈翱厂一站式,网友:很稳定-小影志绿巨人浩克冲电影冲哔哩哔哩
再生元制药公司周五报告其第四季度利润暴跌约46%原因是其眼药贰测濒别补在美国的销售额下降该公司公布截至12月31日的季度净收入为12亿美元即每股收益10.50美元而去年同期为22.3亿美元即每股收益19.69美元