The Permian/Triassic mass extinction plays a great role in the evolutionary history of the Earth.
二叠-三叠纪生物绝灭事件在地史发展中有着重要作用,灭绝加速了物种的进化和更替。
4‰),and are parallel to inorganic organic δ13C values,suggesting a mass extinction occurring in the boundary.
广西来宾蓬莱滩二叠系瓜德鲁普统-乐平统界线剖面已被国际地质科学联合会确定为国际界线层型标准剖面,在该界面附近发生了一次重要的全球性生物绝灭事件。
Radiometric datings showed that the main phase of the Emeishan basalts is ~260 Ma,corresponding to the end-Guadalupian mass extinction.
峨眉山玄武岩的主相喷发时间约为260Ma,与二叠纪晚瓜德鲁普期生物灭绝事件的时间相当。
This paper presents the Lotaka-Volerra model with commensalism,conducts qualitative analysis on the model,and studies the thresholds of persistency and extinction of two species under commensal symbiosis in a polluted environment.
对模型进行了定性研究,并分析了在污染中偏利共生的2种群持续生存与绝灭的阈值。
With helps of statistical perspective the nature of mass extinction can be revealed from fossil records.
文中运用置信区间作了分析 ,说明长兴期末生物大灭绝为突发性、灾难性事
Heedless or deliberate destruction of the natural environment, as by pollutants or an act of war.
生态灭绝对自然环境的无意或有意的毁灭，如污染或战争引起的破坏
Destruction or Coexistence-A Thematic Study of Moby Dick and the Wolf under Ecocriticism;
灭绝还是共存—《白鲸》和《怀念狼》生态文化主题分析
exterminate all the inhabitants of the village
灭绝村中所有的生灵
Tending to extinguish or make extinct.
使灭绝，使消亡趋于灭绝或使灭绝的
The study of the ecosystems in the survival and recovery time in the Early Triassic following the end-Permian mass extinction becomes a hotspot.
二叠纪末大灭绝之后，三叠纪初残存期和复苏期生态系研究成为当今热点。
Global warming, river pollution and destroyed natural habitats are just some of the environmental issues that are facing society today.
全球变暖，河流污染和自然生态区绝灭，这些仅仅是当今社会面临的环境问题的一部分。
That species disappeared in the Ice Age.
那种生物在冰期就灭绝了。
A species can become endangered for different reasons.
一种生物濒于灭绝有多种原因。
any of numerous extinct terrestrial reptiles of the Mesozoic era.
许多已经灭绝的中生代陆栖爬行动物。
Wild life is under threat everywhere.
野生动物到处受到 (灭绝的) 威胁。
The Exsistence and Extinction of a Kind of General Logistic Population;
一类广义Logistic种群的持续生存和灭绝
Extinction risk and population viability analysis of wild Pere David's deer
野放麋鹿种群灭绝风险与生存力分析
The result of the abusive useing ecological resources is ecocide.
对生态资源滥用的结果是生态毁灭。
In the struggle for life, the species, which had not been successful, died out.
在生存竞争中,不能成功的物种就灭绝了.
We ought to be doing our best to save endangered species.
我们应该竭尽全力挽救濒于灭绝的生物。
The extinction of key species could have cascading effects throughout the food web.
关键物种的灭绝可能通过食物链产生级联效应。
One of the most important causes of extinction is loss of habitat.
灭绝的最重要原因之一就是生活环境的丢失。
Paleontologists know plenty about the demise of the dinosaurs.
古生物学家对有关恐龙灭绝知道的很多。