Human beings are chiefly responsible for wild animal extinction.

野生动物灭绝的主要责任在人类。

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Volcanic explosions could bring the whole animal species to extinction.

火山爆发可能会使所有的动物灭绝。

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Similarly, a plant or animal cannot squander all its energy on growing a big body if none would be left over for reproduction, for this is the surest way to extinction.

同样，如果一种植物或动物没有留下任何可以繁殖的后代，它就不能把所有的能量浪费在使自己变得更强壮上，因为这是最可能走向灭绝的方式。

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Scientists warn that without an agreement to reduce so-called green house gas emissions, global temperatures will continue to rise, with the catastrophic consequences of extreme weather events, the spread of drought and disease, and the extinction of plant and animal species.

VOA: standard.2009.12.09

And, in fact, once you teach an animal something, if you stop doing the teaching the response goes away and this is known as extinction.

事实上，条件反射形成以后，如果得不到强化,条件反应就会逐渐消失,这就是消退。

耶鲁公开课 - 心理学导论课程节选

Three species on the Asian subcontinent are close to extinction after eating animal carcasses containing traces of the anti-inflammatory diclofenac.

BBC: NEWS | Science/Nature | Bird groups hopeful on vultures

Already, 17, 000 plant and animal species are threatened with extinction (IUCN, 2009).

UNESCO: MEDIA SERVICES

You could even take a cell from an endangered animal and, without threatening its extinction, make meat from it.

ECONOMIST: Monitor