A species once extinct is gone forever.

一个种一旦灭绝就永远消失了。

Dinosaurs have been extinct for millions of years.

恐龙已经灭绝几百万年了。

" Extinct in the male line? " repeated Ron.

“男系血统已经消失？”罗恩重复道。

So technologies may become marginal, but they rarely go extinct.

所以技术可能边缘化，但很少走向消亡。

The Passenger Pigeon had already gone extinct.

候鸽已经灭绝了。

He also had one volcano that was extinct.

他还有一座死火山。

Today, the name Monty has become all but extinct outside of Monty Python references.

今天，除了蒙提派森会提到之外，蒙蒂这个名字几乎已经灭绝了。

And he used the extinct volcano as a footstool.

而且他把那座死火山就当作凳子。

Which of these animals is not extinct?

以下动一种还没有灭绝？

They came from an extinct giant sloth.

而是来自已灭绝的大型树懒。

Most animals would go extinct without water.

大多数动也会因为缺水而灭绝。

There had been fears it was extinct.

此前，这种鸟类被认为已经灭绝。

Every year thousands of species go extinct.

每年，成千上万的种濒临灭绝。

So the coelacanth, they thought it was extinct.

腔棘鱼之前被认为已经灭绝了。

Every day, we see that more species are becoming extinct.

每一天，我们都看到越来越多的种灭绝。

You're so stupid! How are you not yet extinct?

笨蛋！你怎么还没绝种？

So he cleaned out the extinct volcano, too.

他也把它打扫干净。

What's your relationship to big extinct birds?

你和灭绝大型鸟类是什么关系？

If you do not change you can become extinct.

如果你不改变，你就会被淘汰。

Many Australian mammals, though not actually extinct, are confined to fragments of cat-free habitat.

很多澳大亚哺乳动，虽然并没有灭绝，却被限制在没有猫的栖息地内。