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1·At the current rate of decline, many of the rain forest animals could become extinct in less than 10 years.

按照目前的下降速度，许多雨林动物不到十年就会绝种。《柯林斯英汉双解大词典》

2·However, it is announced that the Chinese paddlefish living in the Yangtze River has become extinct (灭绝) .

然而，据报道，生活在长江的中国白鲟已经灭绝。

3·We must protect these endangered animals before they become extinct.

在这些濒危动物灭绝之前，我们必须保护它们。

4·They will tum out to be the second-largest species of birds to become extinct.

它们将成为第二大灭绝的鸟类。

5·If these great cats become extinct, the smaller animals they prey upon will overpopulate the forests.

如果这些大型猫科动物灭绝了，那么它们捕食的小型动物将会使森林中物种的密度过高。

6·Cases in which many species become extinct within a geologically short interval of time are called mass extinctions.

许多物种在地质上很短的时间间隔内灭绝的情况称为大灭绝。

7·Meteorite impacts can be advantageous for some species, which thrive, and disastrous for other species, which become extinct.

陨石的撞击对某些物种是有利的，它们会茁壮成长；而对其他物种则是灾难性的，它们会灭绝。

8·This was a landscape where antelope of all kinds abounded—along with Bos primigenius, a kind of oxen that has become extinct.

这是一片充满了各种羚羊的土地——还有原牛，一种已经灭绝的牛。

9·Why did Neanderthals become extinct?

为什么尼安得塔人会灭绝呢？

10·We're going to become extinct, he said.

“我们将要灭绝，”他说。

灭绝

1·We must protect these endangered animals before they become extinct.

在这些濒危动物灭绝之前，我们必须保护它们。

2·If these great cats become extinct, the smaller animals they prey upon will overpopulate the forests.

如果这些大型猫科动物灭绝了，那么它们捕食的小型动物将会使森林中物种的密度过高。

3·Meteorite impacts can be advantageous for some species, which thrive, and disastrous for other species, which become extinct.

陨石的撞击对某些物种是有利的，它们会茁壮成长；而对其他物种则是灾难性的，它们会灭绝。

4·This was a landscape where antelope of all kinds abounded—along with Bos primigenius, a kind of oxen that has become extinct.

这是一片充满了各种羚羊的土地——还有原牛，一种已经灭绝的牛。

5·More mammals have become extinct in that country over the last 200 years than in any other place in the world.

在过去的200年前，这个国家中灭绝的哺乳动物物种比世界上的其他任何地方都要多。

绝种

1·If we continue to destroy the countryside, many more animals will become extinct.

我们若继续破坏乡村环境，将会有更多的动物绝种。

2·I think if some animals become extinct, it would be a huge regret for the human race.

我想，若某些动物绝种，是人类非常遗憾的事。