1·Gause performed numerous tow-species experiments in the laboratory, in which one of the species became extinct when only a single kind of resource was available.
高斯在实验室里进行了许多双物种实验，其中一个物种在只有一种单一资源的情况下就灭绝了。
2·The Russian biologist G. F. Gause performed numerous tow-species experiments in the laboratory, in which one of the species became extinct when only a single kind of resource was available.
俄罗斯生物学家 G. F. Gause 在试验室进行了大量的两个物种的实验，试验中，当只有单一的资源时，其中一个物种将会灭绝。
3·Perhaps dinosaurs could not tolerate these extreme temperature changes and became extinct.
也许恐龙无法忍受这些极端的温度变化于是灭绝了。
4·This break in Earth's history is marked by a mass extinction, when as many as half the species on the planet became extinct.
地球历史上的这次重大灾难以物种的大量消亡为标志；当时，地球上多达一半的物种都灭绝了。
5·When prehistoric man arrived in new parts of the world, something strange happened to the large animals: they suddenly became extinct.
当史前人类来到一处新地方时，一些奇怪的事情发生在大型动物身上，那就是它们突然灭绝了。
6·When the second Marquis Cornwallis died sonless, the marquisate became extinct.
当第二个康沃利斯侯爵无子而死时，侯爵就绝迹了。
7·They became extinct, Tim.
提姆，他们灭绝了。
8·Would it matter if tigers became extinct?
如果老虎灭绝了，会造成影响吗？
9·Would it matter if tigers became extinct?
若老虎有一天绝种了，你认为重要吗？
10·And at one time in the past, I almost became extinct.
曾经在过去一个时期，我几乎濒临灭绝。