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《科(Ke)学(Xue)》(20220729出(Chu)版(Ban))一(Yi)周(Zhou)论(Lun)文(Wen)导(Dao)读(Du)2022-07-31 20:00·科(Ke)学(Xue)网(Wang)编(Bian)译(Yi) | 李(Li)言(Yan)Science, 29 JUL 2022, VOL 377, ISSUE 6605《科(Ke)学(Xue)》2022年(Nian)7月(Yue)29日(Ri),第(Di)377卷(Juan),6605期(Qi)材(Cai)料(Liao)科(Ke)学(Xue)Material ScienceInactive (PbI2)2RbCl stabilizes perovskite films for efficient solar cells非(Fei)活(Huo)性(Xing)(PbI2)2RbCl稳(Wen)定(Ding)钙(Gai)钛(Zuo)矿(Kuang)薄(Bao)膜(Mo)高(Gao)效(Xiao)太(Tai)阳(Yang)能(Neng)电(Dian)池(Chi)▲ 作(Zuo)者(Zhe):YANG ZHAO, FEI MAZIHAN QU, SHIQI YU, TAO SHEN, HUI-XIONG DENG et al.▲ 链(Lian)接(Jie):https://www.science.org/doi/10.1126/science.abp8873▲ 摘(Zhai)要(Yao):在(Zai)卤(Lu)化(Hua)物(Wu)钙(Gai)钛(Zuo)矿(Kuang)太(Tai)阳(Yang)能(Neng)电(Dian)池(Chi)中(Zhong),二(Er)次(Ci)相(Xiang)过(Guo)量(Liang)碘(Dian)化(Hua)铅(Qian)(PbI2)的(De)形(Xing)成(Cheng)对(Dui)功(Gong)率(Lv)转(Zhuan)换(Huan)效(Xiao)率(Lv)(PCE)有(You)一(Yi)定(Ding)的(De)积(Ji)极(Ji)影(Ying)响(Xiang),但(Dan)会(Hui)损(Sun)害(Hai)器(Qi)件(Jian)的(De)稳(Wen)定(Ding)性(Xing),并(Bing)在(Zai)电(Dian)压(Ya)扫(Sao)描(Miao)时(Shi)造(Zao)成(Cheng)较(Jiao)大(Da)的(De)滞(Zhi)后(Hou)效(Xiao)应(Ying)。通(Tong)过(Guo)RbCl掺(Chan)杂(Za),我(Wo)们(Men)将(Jiang)PbI2转(Zhuan)化(Hua)为(Wei)非(Fei)活(Huo)性(Xing)(PbI2)2RbCl化(Hua)合(He)物(Wu),有(You)效(Xiao)地(Di)稳(Wen)定(Ding)了(Liao)钙(Gai)钛(Zuo)矿(Kuang)相(Xiang)。基(Ji)于(Yu)此(Ci)方(Fang)法(Fa),我(Wo)们(Men)获(Huo)得(De)了(Liao)FAPbI3钙(Gai)钛(Zuo)矿(Kuang)太(Tai)阳(Yang)能(Neng)电(Dian)池(Chi),其(Qi)认(Ren)证(Zheng)功(Gong)率(Lv)转(Zhuan)换(Huan)效(Xiao)率(Lv)PCE为(Wei)25.6%。在(Zai)储(Chu)存(Cun)1000小(Xiao)时(Shi)后(Hou),器(Qi)件(Jian)保(Bao)留(Liu)了(Liao)96%原(Yuan)始(Shi)功(Gong)率(Lv)转(Zhuan)换(Huan)效(Xiao)率(Lv)PCE值(Zhi),在(Zai)85°C下(Xia)进(Jin)行(Xing)500小(Xiao)时(Shi)热(Re)稳(Wen)定(Ding)性(Xing)测(Ce)试(Shi)后(Hou),保(Bao)留(Liu)了(Liao)80%原(Yuan)始(Shi)功(Gong)率(Lv)转(Zhuan)换(Huan)效(Xiao)率(Lv)PCE值(Zhi)。▲ Abstract:In halide perovskite solar cells the formation of secondary-phase excess lead iodide (PbI2) has some positive effects on power conversion efficiency (PCE) but can be detrimental to device stability and lead to large hysteresis effects in voltage sweeps. We converted PbI2 into an inactive (PbI2)2RbCl compound by RbCl doping, which effectively stabilizes the perovskite phase. We obtained a certified PCE of 25.6% for FAPbI3 (FA, formamidinium) perovskite solar cells on the basis of this strategy. Devices retained 96% of their original PCE values after 1000 hours of shelf storage and 80% after 500 hours of thermal stability testing at 85°C.Ion-modulated radical doping of spiro-OMeTAD for more efficient and stable perovskite solar cellsspiro-OMeTAD离(Li)子(Zi)调(Diao)制(Zhi)自(Zi)由(You)基(Ji)掺(Chan)杂(Za)钙(Gai)钛(Zuo)矿(Kuang)电(Dian)池(Chi)▲ 作(Zuo)者(Zhe):TIANKAI ZHANG, FENG WANG, HAK-BEOM KIM, IN-WOO CHOIN et al.▲ 链(Lian)接(Jie):https://www.science.org/doi/10.1126/science.abo2757▲ 摘(Zhai)要(Yao):我(Wo)们(Men)开(Kai)发(Fa)了(Liao)一(Yi)种(Zhong)新(Xin)的(De)spiro-OMeTAD掺(Chan)杂(Za)方(Fang)式(Shi),通(Tong)过(Guo)使(Shi)用(Yong)稳(Wen)定(Ding)的(De)有(You)机(Ji)自(Zi)由(You)基(Ji)作(Zuo)为(Wei)掺(Chan)杂(Za)剂(Ji),离(Li)子(Zi)盐(Yan)作(Zuo)为(Wei)掺(Chan)杂(Za)调(Diao)制(Zhi)剂(Ji),避(Bi)免(Mian)了(Liao)氧(Yang)化(Hua)后(Hou)的(De)问(Wen)题(Ti)。我(Wo)们(Men)实(Shi)现(Xian)了(Liao)大(Da)于(Yu)25%的(De)能(Neng)量(Liang)转(Zhuan)换(Huan)效(Xiao)率(Lv),并(Bing)大(Da)大(Da)提(Ti)高(Gao)了(Liao)恶(E)劣(Lie)条(Tiao)件(Jian)下(Xia)的(De)设(She)备(Bei)稳(Wen)定(Ding)性(Xing)。自(Zi)由(You)基(Ji)提(Ti)供(Gong)的(De)空(Kong)穴(Xue)极(Ji)化(Hua)子(Zi)可(Ke)以(Yi)瞬(Shun)间(Jian)增(Zeng)加(Jia)电(Dian)导(Dao)率(Lv)和(He)功(Gong)函(Han)数(Shu)(WF),而(Er)离(Li)子(Zi)盐(Yan)通(Tong)过(Guo)影(Ying)响(Xiang)空(Kong)穴(Xue)极(Ji)化(Hua)子(Zi)的(De)能(Neng)量(Liang)学(Xue)进(Jin)一(Yi)步(Bu)调(Diao)节(Jie)WF。这(Zhe)种(Zhong)有(You)机(Ji)半(Ban)导(Dao)体(Ti)掺(Chan)杂(Za)方(Fang)式(Shi)可(Ke)以(Yi)将(Jiang)导(Dao)电(Dian)性(Xing)和(He)功(Gong)函(Han)数(Shu)WF可(Ke)调(Diao)性(Xing)解(Jie)耦(Zuo),可(Ke)以(Yi)激(Ji)发(Fa)其(Qi)他(Ta)光(Guang)电(Dian)器(Qi)件(Jian)的(De)进(Jin)一(Yi)步(Bu)优(You)化(Hua)。▲ Abstract:We developed a new doping strategy for spiro-OMeTAD that avoids post-oxidation by using stable organic radicals as the dopant and ionic salts as the doping modulator (referred to as ion-modulated radical doping). We achieved PCEs of >25% and much-improved device stability under harsh conditions. The radicals provide hole polarons that instantly increase the conductivity and work function (WF), and ionic salts further modulate the WF by affecting the energetics of the hole polarons. This organic semiconductor doping strategy, which decouples conductivity and WF tunability, could inspire further optimization in other optoelectronic devices.DNA-guided lattice remodeling of carbon nanotubesDNA引(Yin)导(Dao)的(De)碳(Tan)纳(Na)米(Mi)管(Guan)晶(Jing)格(Ge)重(Zhong)构(Gou)▲ 作(Zuo)者(Zhe):ZHIWEI LIN, LETICIA C. BELTR?N, ZEUS A. DE LOS SANTOS, YINONG LI et al.▲ 链(Lian)接(Jie):https://www.science.org/doi/10.1126/science.abo4628▲ 摘(Zhai)要(Yao):在(Zai)此(Ci),我(Wo)们(Men)报(Bao)告(Gao)一(Yi)种(Zhong)采(Cai)用(Yong)鸟(Niao)嘌(Zuo)呤(Zuo)碱(Jian)基(Ji)的(De)DNA序(Xu)列(Lie)特(Te)异(Yi)性(Xing)交(Jiao)联(Lian)化(Hua)学(Xue)的(De)解(Jie)决(Jue)方(Fang)案(An)。通(Tong)过(Guo)DNA筛(Shai)选(Xuan),我(Wo)们(Men)确(Que)定(Ding)了(Liao)一(Yi)个(Ge)序(Xu)列(Lie)C3GC7GC3,与(Yu)(8,3)对(Dui)映(Ying)体(Ti)反(Fan)应(Ying)产(Chan)生(Sheng)最(Zui)小(Xiao)的(De)无(Wu)序(Xu)诱(You)导(Dao)拉(La)曼(Man)模(Mo)式(Shi)强(Qiang)度(Du)和(He)光(Guang)致(Zhi)发(Fa)光(Guang)Stokes位(Wei)移(Yi),表(Biao)明(Ming)有(You)序(Xu)排(Pai)列(Lie)的(De)晶(Jing)格(Ge)缺(Que)陷(Xian)的(De)形(Xing)成(Cheng)。冷(Leng)冻(Dong)电(Dian)子(Zi)显(Xian)微(Wei)镜(Jing)显(Xian)示(Shi)C3GC7GC3-(8, 3)具(Ju)有(You)有(You)序(Xu)的(De)DNA螺(Luo)旋(Xuan)结(Jie)构(Gou),其(Qi)螺(Luo)距(Ju)为(Wei)6.5 ?。反(Fan)应(Ying)机(Ji)理(Li)分(Fen)析(Xi)表(Biao)明(Ming),这(Zhe)种(Zhong)螺(Luo)距(Ju)是(Shi)由(You)一(Yi)系(Xi)列(Lie)g修(Xiu)饰(Shi)的(De)碳(Tan)-碳(Tan)键(Jian)沿(Yan)着(Zhuo)螺(Luo)旋(Xuan)线(Xian)按(An)固(Gu)定(Ding)距(Ju)离(Li)分(Fen)离(Li)而(Er)成(Cheng)的(De)。我(Wo)们(Men)的(De)发(Fa)现(Xian)可(Ke)能(Neng)用(Yong)于(Yu)纳(Na)米(Mi)管(Guan)晶(Jing)格(Ge)重(Zhong)构(Gou)以(Yi)获(Huo)得(De)新(Xin)的(De)电(Dian)子(Zi)特(Te)性(Xing)。▲ Abstract:We report a solution using DNA-directed, guanine (G)-specific cross-linking chemistry. Through DNA screening we identify a sequence, C3GC7GC3, whose reaction with an (8,3) enantiomer yields minimum disorder-induced Raman mode intensities and photoluminescence Stokes shift, suggesting ordered defect array formation. Single-particle cryo–electron microscopy shows that the C3GC7GC3 functionalized (8,3) has an ordered helical structure with a 6.5 angstroms periodicity. Reaction mechanism analysis suggests that the helical periodicity arises from an array of G-modified carbon-carbon bonds separated by a fixed distance along an armchair helical line. Our findings may be used to remodel nanotube lattices for novel electronic properties.Nanosecond protonic programmable resistors for analog deep learning用(Yong)于(Yu)模(Mo)拟(Ni)深(Shen)度(Du)学(Xue)习(Xi)的(De)纳(Na)秒(Miao)质(Zhi)子(Zi)可(Ke)编(Bian)程(Cheng)电(Dian)阻(Zu)▲ 作(Zuo)者(Zhe):MURAT ONEN, NICOLAS EMOND, BAOMING WANG et al.▲ 链(Lian)接(Jie):https://www.science.org/doi/10.1126/science.abp8064▲ 摘(Zhai)要(Yao):在(Zai)这(Zhe)项(Xiang)工(Gong)作(Zuo)中(Zhong),我(Wo)们(Men)生(Sheng)成(Cheng)了(Liao)硅(Gui)兼(Jian)容(Rong)的(De)纳(Na)米(Mi)级(Ji)质(Zhi)子(Zi)可(Ke)编(Bian)程(Cheng)电(Dian)阻(Zu),其(Qi)在(Zai)极(Ji)端(Duan)电(Dian)场(Chang)下(Xia)具(Ju)有(You)非(Fei)常(Chang)理(Li)想(Xiang)的(De)特(Te)性(Xing)。这(Zhe)种(Zhong)操(Cao)作(Zuo)机(Ji)制(Zhi)使(Shi)质(Zhi)子(Zi)在(Zai)室(Shi)温(Wen)下(Xia)以(Yi)一(Yi)种(Zhong)节(Jie)能(Neng)的(De)方(Fang)式(Shi)在(Zai)纳(Na)秒(Miao)内(Nei)受(Shou)控(Kong)穿(Chuan)梭(Suo)和(He)插(Cha)入(Ru)。该(Gai)装(Zhuang)置(Zhi)具(Ju)有(You)对(Dui)称(Cheng)、线(Xian)性(Xing)和(He)可(Ke)逆(Ni)的(De)调(Diao)制(Zhi)特(Te)性(Xing),多(Duo)个(Ge)电(Dian)导(Dao)状(Zhuang)态(Tai)覆(Fu)盖(Gai)20× 动(Dong)态(Tai)范(Fan)围(Wei)。因(Yin)此(Ci),全(Quan)固(Gu)态(Tai)人(Ren)工(Gong)突(Tu)触(Chu)的(De)时(Shi)空(Kong)能(Neng)量(Liang)性(Xing)能(Neng)可(Ke)以(Yi)大(Da)大(Da)超(Chao)过(Guo)它(Ta)们(Men)的(De)生(Sheng)物(Wu)对(Dui)应(Ying)物(Wu)。▲ Abstract:In this work, we generated silicon-compatible nanoscale protonic programmable resistors with highly desirable characteristics under extreme electric fields. This operation regime enabled controlled shuttling and intercalation of protons in nanoseconds at room temperature in an energy-efficient manner. The devices showed symmetric, linear, and reversible modulation characteristics with many conductance states covering a 20× dynamic range. Thus, the space-time-energy performance of the all–solid-state artificial synapses can greatly exceed that of their biological counterparts.地(Di)球(Qiu)科(Ke)学(Xue)Earth ScienceConstraints on the adjustment of tidal marshes to accelerating sea level rise潮(Chao)汐(Xi)沼(Zhao)泽(Ze)调(Diao)节(Jie)对(Dui)在(Zai)海(Hai)平(Ping)面(Mian)加(Jia)速(Su)上(Shang)升(Sheng)的(De)制(Zhi)约(Yue)因(Yin)素(Su)▲ 作(Zuo)者(Zhe):NEIL SAINTILAN, KATYA E. KOVALENKO, GLENN GUNTENSPERGEN et al.▲ 链(Lian)接(Jie):https://www.science.org/doi/10.1126/science.abo7872▲ 摘(Zhai)要(Yao):珍(Zhen)贵(Gui)的(De)潮(Chao)汐(Xi)沼(Zhao)泽(Ze)生(Sheng)态(Tai)系(Xi)统(Tong)在(Zai)面(Mian)对(Dui)相(Xiang)关(Guan)海(Hai)平(Ping)面(Mian)上(Shang)升(Sheng)时(Shi)的(De)脆(Cui)弱(Ruo)性(Xing)仍(Reng)然(Ran)存(Cun)疑(Yi)。先(Xian)前(Qian)对(Dui)海(Hai)平(Ping)面(Mian)上(Shang)升(Sheng)的(De)恢(Hui)复(Fu)力(Li)的(De)评(Ping)估(Gu)显(Xian)示(Shi),根(Gen)据(Ju)当(Dang)代(Dai)或(Huo)全(Quan)新(Xin)世(Shi)的(De)地(Di)质(Zhi)数(Shu)据(Ju)的(De)不(Bu)同(Tong),沼(Zhao)泽(Ze)可(Ke)以(Yi)通(Tong)过(Guo)沉(Chen)积(Ji)物(Wu)的(De)增(Zeng)加(Jia)和(He)海(Hai)拔(Ba)的(De)增(Zeng)加(Jia)来(Lai)调(Diao)整(Zheng)海(Hai)平(Ping)面(Mian)上(Shang)升(Sheng)的(De)恢(Hui)复(Fu)力(Li)结(Jie)果(Guo)也(Ye)截(Jie)然(Ran)不(Bu)同(Tong)。通(Tong)过(Guo)分(Fen)析(Xi)当(Dang)代(Dai)的(De)全(Quan)球(Qiu)数(Shu)据(Ju),我(Wo)们(Men)发(Fa)现(Xian)沼(Zhao)泽(Ze)沉(Chen)积(Ji)物(Wu)的(De)增(Zeng)加(Jia)与(Yu)海(Hai)平(Ping)面(Mian)的(De)上(Shang)升(Sheng)是(Shi)对(Dui)等(Deng)的(De),这(Zhe)似(Si)乎(Hu)证(Zheng)实(Shi)了(Liao)之(Zhi)前(Qian)所(Suo)说(Shuo)的(De)沼(Zhao)泽(Ze)恢(Hui)复(Fu)力(Li)。然(Ran)而(Er),地(Di)基(Ji)沉(Chen)降(Jiang)量(Liang)随(Sui)吸(Xi)积(Ji)量(Liang)呈(Cheng)非(Fei)线(Xian)性(Xing)增(Zeng)长(Chang)。因(Yin)此(Ci),沼(Zhao)泽(Ze)高(Gao)度(Du)的(De)增(Zeng)加(Jia)受(Shou)到(Dao)海(Hai)平(Ping)面(Mian)上(Shang)升(Sheng)的(De)限(Xian)制(Zhi),而(Er)出(Chu)现(Xian)的(De)下(Xia)降(Jiang)与(Yu)全(Quan)新(Xin)世(Shi)对(Dui)潮(Chao)汐(Xi)沼(Zhao)泽(Ze)脆(Cui)弱(Ruo)性(Xing)的(De)观(Guan)测(Ce)结(Jie)果(Guo)一(Yi)致(Zhi)。▲ Abstract:Much uncertainty exists about the vulnerability of valuable tidal marsh ecosystems to relative sea level rise. Previous assessments of resilience to sea level rise, to which marshes can adjust by sediment accretion and elevation gain, revealed contrasting results, depending on contemporary or Holocene geological data. By analyzing globally distributed contemporary data, we found that marsh sediment accretion increases in parity with sea level rise, seemingly confirming previously claimed marsh resilience. However, subsidence of the substrate shows a nonlinear increase with accretion. As a result, marsh elevation gain is constrained in relation to sea level rise, and deficits emerge that are consistent with Holocene observations of tidal marsh vulnerability.生(Sheng)物(Wu)学(Xue)BiologyPollinators of the sea: A discovery of animal-mediated fertilization in seaweed海(Hai)洋(Yang)授(Shou)粉(Fen)者(Zhe):海(Hai)藻(Zao)中(Zhong)动(Dong)物(Wu)介(Jie)导(Dao)受(Shou)精(Jing)的(De)发(Fa)现(Xian)▲ 作(Zuo)者(Zhe):E. LAVAUT, M.-L. GUILLEMIN, S. COLINA. FAURE et al.▲ 链(Lian)接(Jie):https://www.science.org/doi/10.1126/science.abo6661▲ 摘(Zhai)要(Yao):长(Chang)期(Qi)以(Yi)来(Lai)认(Ren)为(Wei)海(Hai)洋(Yang)中(Zhong)不(Bu)存(Cun)在(Zai)动(Dong)物(Wu)授(Shou)粉(Fen)的(De)观(Guan)点(Dian)在(Zai)最(Zui)近(Jin)的(De)海(Hai)草(Cao)研(Yan)究(Jiu)中(Zhong)遭(Zao)到(Dao)了(Liao)反(Fan)对(Dui),这(Zhe)促(Cu)进(Jin)了(Liao)其(Qi)他(Ta)对(Dui)海(Hai)洋(Yang)动(Dong)物(Wu)的(De)研(Yan)究(Jiu)。这(Zhe)在(Zai)红(Hong)藻(Zao)中(Zhong)尤(You)其(Qi)相(Xiang)关(Guan)。在(Zai)红(Hong)藻(Zao)中(Zhong),雌(Ci)性(Xing)配(Pei)子(Zi)没(Mei)有(You)解(Jie)放(Fang),雄(Xiong)性(Xing)配(Pei)子(Zi)没(Mei)有(You)鞭(Bian)毛(Mao)。利(Li)用(Yong)等(Deng)足(Zu)类(Lei)动(Dong)物(Wu)Idotea balthica和(He)红(Hong)藻(Zao)Gracilaria gracilis的(De)实(Shi)验(Yan),我(Wo)们(Men)证(Zheng)明(Ming)了(Liao)生(Sheng)物(Wu)相(Xiang)互(Hu)作(Zuo)用(Yong)通(Tong)过(Guo)动(Dong)物(Wu)运(Yun)输(Shu)体(Ti)内(Nei)的(De)精(Jing)子(Zi)显(Xian)著(Zhu)提(Ti)高(Gao)了(Liao)藻(Zao)类(Lei)的(De)受(Shou)精(Jing)成(Cheng)功(Gong)率(Lv)。这(Zhe)一(Yi)发(Fa)现(Xian)表(Biao)明(Ming),动(Dong)物(Wu)介(Jie)导(Dao)的(De)受(Shou)精(Jing)可(Ke)能(Neng)在(Zai)陆(Lu)地(Di)和(He)海(Hai)洋(Yang)环(Huan)境(Jing)中(Zhong)独(Du)立(Li)进(Jin)化(Hua),并(Bing)增(Zeng)加(Jia)了(Liao)在(Zai)植(Zhi)物(Wu)上(Shang)岸(An)之(Zhi)前(Qian)在(Zai)海(Hai)洋(Yang)中(Zhong)出(Chu)现(Xian)的(De)可(Ke)能(Neng)性(Xing)。▲ Abstract:The long-held belief that animal-mediated pollination is absent in the sea has recently been contradicted in seagrasses, motivating investigations of other marine phyla. This is particularly relevant in red algae, in which female gametes are not liberated and male gametes are not flagellated. Using experiments with the isopod Idotea balthica and the red alga Gracilaria gracilis, we demonstrate that biotic interactions dramatically increase the fertilization success of the alga through animal transport of spermatia on their body. This discovery suggests that animal-mediated fertilization could have evolved independently in terrestrial and marine environments and raises the possibility of its emergence in the sea before plants moved ashore.

辩颈补辞测颈锄耻颈锄丑辞苍驳测颈肠丑耻锄耻飞别颈诲补颈箩颈补,辩耻濒颈补辞测补苍驳辩颈苍驳,测补苍驳辩颈苍驳产耻驳耻蝉丑颈蝉耻诲别测补苍驳耻补苍驳,测颈谤补苍箩耻别谤补苍诲别箩颈补驳别颈濒颈补辞迟补。迟耻:尘别颈驳耻辞产耻迟辞苍驳诲补苍驳肠颈测颈苍虫颈苍驳锄颈产别苍诲耻补苍箩颈补苍驳耻补苍测补辞辩颈耻

一(驰颈)支(窜丑颈)支(窜丑颈)颇(笔辞)有(驰辞耻)实(厂丑颈)力(尝颈)的(顿别)科(碍别)研(驰补苍)团(罢耻补苍)队(顿耻颈)入(搁耻)驻(窜丑耻)粤(驰耻别)伽(窜耻辞)新(齿颈苍)梅(惭别颈)产(颁丑补苍)业(驰别)园(驰耻补苍),助(窜丑耻)力(尝颈)提(罢颈)升(厂丑别苍驳)伽(窜耻辞)师(厂丑颈)果(骋耻辞)品(笔颈苍)附(贵耻)加(闯颈补)值(窜丑颈),是(厂丑颈)喀(碍补)什(厂丑颈)地(顿颈)区(蚕耻)稳(奥别苍)步(叠耻)提(罢颈)升(厂丑别苍驳)林(尝颈苍)果(骋耻辞)业(驰别)产(颁丑补苍)业(驰别)化(贬耻补)发(贵补)展(窜丑补苍)的(顿别)结(闯颈别)果(骋耻辞)。

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