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The extinction or appearance of these Ostracoda always occurred in a short time interval, and can be correlated locally and globally, so they are of importance in bioeventstratigraphy. This article listed six such biological events in Qaidam Basin and discussed their causes. The extinction of Cetacella reflected temperature decrease at global scale and changes of palaeoclimate zones during the latest Jurassic and the earliest Cretaceous; The rapid decline of Cypridea in the earliest Cretaceous may be a result of the strikes of small planets; at the latest middle-Eocene Austrocypris became extinct, and at Oligocene Hemicyprinotus disappeared. These events related to the changes of the geological conditions at that time. The explosion of Cyprideis at the middle-Miocene was because the rise of Qinghai-Xizang Plateau which resulted in the dry climate and development of salt lakes.

这些水生生物的绝灭或发生均很迅速，在区域或全球范围内均可对比，具有生物事件地层学意义：Cetacella属的绝灭可能是侏罗、白垩纪之交全球性的古气候降温和气候带变化在柴达木盆地的反映；早白垩世之后Cypridea的迅速衰退是地外因素灾变的结果；中始新世晚期的Austrocypris的绝灭、渐新世Hemicyprinotus的绝灭都与当时地质条件的改变存在著内在的联系；中中新世Cyprideis的爆发推断是青藏高原隆升，导致气候乾燥、湖水咸化的结果；而晚更新世晚期1。

A large extinct marine reptile having paddlelike limbs that was common in Europe and North America during the Mesozoic Era .

蛇颈龙属常见于欧洲和北美洲中生代，有桨状肢已灭绝的一种大型海洋爬行动物

A large extinct marine reptile having paddlelike limbs that was common in Europe and North America during the ''.

蛇颈龙属常见于欧洲和北美洲中生代，有桨状肢已灭绝的一种大型海洋爬行动物

Some seven million years ago, this ancient ape species split into gorillas and the ancestors of humans and chimps, with both lineages infected by both species of lice. But Pediculus then fell extinct in its gorilla hosts, according to Dr. Reed's reconstruction, and Phthirus vanished from the chimp-human ancestor.

大概700万年前，古灵长类分裂成大猩猩，和黑猩猩和人类的共同祖先，两个物种都用有两种虱子，但大猩猩虱子在人类这一分支绝种，而黑猩猩虱子也在大猩猩身上绝种。

The ancient and now extinct language of Pharaonic Egypt; written records date back to 3000 BC.

古代埃及法老的现在绝迹的语言；书面记录要追溯到公元前3000年。

The ancient and now extinct language of Pharaonic Egypt; written records ''.

古代埃及法老的现在绝迹的语言；书面记录要追溯''。

The extinct coefficients being greater for photosynthetically active radiation than those for total radiation are closely related to the inverse proportion of solar altitudes (sinh0) during one day.

光合有效辐射的消光系数大于总辐射的消光系数；一天中，群体下部的光照条件以中午前后为佳，消光系数最小；k值与太阳高度角的正弦成反比。

Restoring natural areas to presettlement conditions would preserve plant and animal species that are in danger of becoming extinct.

恢复自然区域可保护动、植物濒临灭绝的危险

Memes that propagate less prolifically may become extinct, while others may survive, spread, and mutate.

Memes的宣传较少盛产可能灭绝，而另一些可能会生存，传播和变异。

It is very much notable that in stark contrast to their claims and propoganda using fabricated and manufactured documents, the so called brahmins among these newcomers did not have worship rights in temples of ancient tamil country, most of which like its monarchy were independent priesthoods officiated previously by certain pre-appointed puranic ancient communities like nambudiris, which have now become almost extinct.

这是非常值得注意的是强烈的对比，他们的要求和宣传使用伪造证件和制造，所谓的婆罗门在这些新来者并没有在古代寺庙朝拜泰米尔国的权利，其中大部分是像它的君主是独立的僧侣以前某些主持前委像nambudiris，这已成为几乎绝迹puranic古老的社区。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。