A plastron is the underside of a tortoise or turtle's shell.

海龟的底部有龟甲。

Turtles and tortoises have hard shells which protect their bodies.

龟有坚硬的龟壳来们的身体。

Professor Binns paused again, pursing his lips, looking like a wrinkled old tortoise.

宾斯教授又停顿了一下，噘起嘴唇，活像一只皱巴巴的老乌龟。

The tortoise walks very slowly. The other animals are all cheering for the Tortoise.

而乌龟走得很慢，其他的动物都在为乌龟加油。

The tortoise said not a word, but toiled on.

乌龟没有说话，只是继续艰难地向前爬着。

The tortoise lagged behind the rabbit when they recompeted in the race.

龟兔重新跑时，乌龟远远地落在兔子后面。

By the time the tortoise came up, the hare was sleeping.

等到乌龟赶上来时，他睡着了。

Jonathan the giant tortoise is celebrating his 190th birthday.

巨型乌龟Jonathan正在庆祝的190岁生日。

And it's not jus the tortoise that relies on them.

并不是只有乌龟才用得到们。

The researchers said they believe the adult female tortoise is more than 100 years old.

研究人员表示，他们认为这只雌性乌龟已经有100多岁了。

It has long ears and runs very fast, much faster than any tortoise.

有很长的耳朵，跑得很快，比任何乌龟都快得多。

The hare sits down under a big tree and waits for the tortoise.

野兔坐在一棵大树下等着乌龟。

How could a humble tortoise beat the legendary Greek hero Achilles in a race?

一只不起眼的乌龟怎样才能在跑中战胜希腊英雄阿基里斯呢?

Oh, my gosh! The giant Somalian leopard tortoise!

老天！索马里巨型豹龟！

But today, we don't hunt the tortoises.

但如今，我们不再猎杀乌龟。

Tortoises are cold-blooded animals. They rely on external temperature to keep themselves warm.

乌龟是冷血动物。他们依靠外部温度持自身温暖。

Giant tortoises, however, can't burrow. And they sleep above ground.

然而，巨型陆龟却没有挖掘的技能。他们在地上冬眠。

The non-native animals are a special threat to the giant tortoises of the Galapagos.

这些外来动物对加拉帕戈斯群岛的巨型陆龟构成了特殊的威胁。

The tortoises almost disappeared in the 1800s because of hunting.

由于狩猎，巨型陆龟在19世纪几乎消失了。

A gopher tortoise rolled into a gym in Florida to get it swollen.

一只地鼠龟滚进了佛罗里达州的一家健身房。