Airborne soot and dirt from the impact blanketed Earth, inhibiting photosynthesis and triggering mass extinction of species.

撞击产生的烟尘和灰尘覆盖了地球，抑制了光合作用，引发了物种的大规模灭绝。

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Prof. Laughlin concedes that excess carbon dioxide could – "in a handful of examples" – contribute to the extinction of species.

劳克林承认，过多的二氧化碳会导致物种灭绝—可以找到一些例子。

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It is one of the factors controlling the size of competing populations, and in extreme cases it may lead to the extinction of one of the competing species.

它是控制竞争种群规模的因素之一，在极端情况下，它可能导致一个竞争物种的灭绝。

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Today,the species is on the verge of extinction.

VOA: special.2009.03.25

Some estimates suggest species extinction because of human activity is about 1,000 times faster than the natural rate of loss.

VOA: standard.2010.01.31

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

From vulcanism to the extinction of species to global climate change and on to creation itself, she tackles complex topics with dexterity.

ECONOMIST: Island life

They are just tired of being hectored by scientists proclaiming certain apocalypses that never pan out: Examples include acid rain and the death of the forest, asteroids, the population bomb, and a catastrophic extinction of species that has eluded detection.

FORBES: Sound, Fury And The Policy Of Climate Change

Spectators will be able to engage in a wide-range of scientific discussions including the use of atoms to study space, testing innovative technology to tackle illness, and assessing the risk of extinction of a species.

UNESCO: Women in Science take to their Soapboxes