Most mammals are diphyodonts.

大部分哺乳类动物有乳齿及永久齿之别.

《现代英汉综合大词典》

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.

电影对白

Barney : Hi that's not a mastodon, its Fred singing.

那可不是乳齿象, 是弗雷德在唱歌.

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After you are six, your milk teeth begin to fall out.

在你六岁之后, 乳齿开始掉下来.

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She said she hesitated to encourage parents to pursue baby tooth banking.

她说,她并不鼓励家长们将孩子的乳齿存入齿库.

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They hunted huge creatures like the mastodon, which were similar to the modern elephant.

他们的捕食对象都是些庞然大物,比如跟现在的大象体型相似的乳齿象.

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North American mastodon; in some classifications considered a mammoth rather than a mastodon.

北美洲的乳齿象; 在一些分类中被当作猛犸而不是乳齿象.

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She says they were only made for scenery - like the rhinoceros and the mastodon.

她说,瀑布完全是为了点缀风景而存在的,犀牛和乳齿象也是一样.

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