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。
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。
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。
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。
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。
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。
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。
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。
Why did Neanderthals become extinct?
为什么尼安得塔人会灭绝呢？
If you don't change, you can become extinct!
如果你不改变，你会变得迟钝。
Many species of animals have become extinct.
许多动物已经绝迹了。
Without nature preserve, more animals are likely to become extinct.
如果没有自然保护区，很有可能更多的动物将要灭绝。
If there did not exist some one who loved, the sun would become extinct.
人间如果没有爱，太阳也会灭。
Letting new ideas become extinct causes the game to remain too traditional.
新想法的灭绝使棒球变得太古板。
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。
In America, 53 languages have become extinct since 1950, more than in any other country.
美国自从1950年以来已有53种语言灭绝，比其它任何国家都要多。
As far as I know, a great many species of fish have become extinct in this century.
据我所知，本世纪有很多种鱼已经灭绝了。
If we do not create nature reserves, more animal species will probably become extinct.
如果没有自然保护区，很有可能更多的动物将要灭绝。
After all, if an animal's habitat is destroyed, the animal will likely become extinct.
毕竟，如果动物的栖息地被破坏，动物就会灭绝。
A kind of animal become extinct when it dies out. Like dinosaurs. Dinosaurs are extinct.
一种动物种类全死掉后，就是灭绝。就像恐龙一样，它已经灭绝了。
He said he was not only told that we would become extinct, but when and how it would happen.
他说，他不只是说我们会成为灭绝，但何时及如何，它会发生。
Some species of animals have Become extinct Because they could not adapt to a changing environment.
有一些动物已经灭种了，因为它们不能适应环境的变化。
Scientists estimate that 150-200 species of plant, insect, bird and mammal become extinct every 24 hours.
科学家估计，每过24小时，就有150至200种植物、昆虫、鸟类和哺乳动物灭绝。
Nature is a victim of the upheaval on Earth, and over a long period many species have become extinct.
大自然是地球上发生动乱的受害者，在很长的一段时期，许多的地球物种消亡了。
Despite diminishing - and eventually disappearing - summer Arctic ice, polar bears will not become extinct.
尽管夏季北极冰川正在减少，并最终消失，北极熊却不会灭绝。
Despite diminishing - and eventually disappearing - summer Arctic ice, polar bears will not become extinct.
尽管夏季北极冰川正在减少，并最终消失，北极熊却不会灭绝。
应用推荐