In North America, mastodons and mammoths lived together.

在北美洲，乳齿象和猛犸象生活在一起。

The mastodon is extinct.

乳齿象已经灭绝了。

The mastodon is a close relative of the ancestral elephant.

乳齿象是始祖象的近亲。

Isn't the mastodon from the Pliocene Epoch?

乳齿象不是上新世的吗？

The ancestors of American Indians probably knew the mastodon.

美洲印第安人的祖先大概知道乳齿象。

Okay, now the Mastodon is from the semi-late Jurassic period.

接下来这头乳齿象是来自侏罗纪中后期。

One of the animals whose bones archeologists study is the mastodon.

他们研究的动物骨骸之一，就是乳齿象。

While she sits at home trying to get the mastodon smell out of the carpet!

而她却待家里设法去除地毯上乳齿象的味道！