mammals

Most mammals live on land.

大多数哺乳动物生活在陆地上.

The boa feeds on birds and small mammals.

蟒主要吃鸟和小的哺乳动物.

Bats are the only mammals to have wings and to achieve sustained flight.

蝙蝠是唯一的有翅膀且能持续飞行的哺乳动物.

They're cold-blooded like fish, but they always have lungs like mammals.

它们像鱼一样是 冷血动物, 但它们又像哺乳动物一样总长着肺.

He lists three types of steroid sex hormones that function in mammals.

他列举在哺乳动物中起作用的三种类固醇性激素.

Most mammals are diphyodonts.

大部分哺乳类动物有乳齿及永久齿之别.

Lactation is the final phase of the reproductive cycle of mammals.

泌乳是哺乳动物繁殖周期的最后阶段.

There are lots of marine mammals such as whales and seals in the sea.

海洋里有许多诸如鲸鱼和海豹类的海生哺乳动物.

Mammals arose from a fairly primitive reptile in the Mesozoic era.

哺乳类起源于中生代宛若原始的爬虫类.

Mammoths were herbivorous mammals.

猛犸是食草性哺乳动物。

Whales belong among the mammals.

鲸鱼属于哺乳动物.

Suckling is an instinct in mammals.

哺乳是哺乳动物的本能.

Humans experience a delayed maturity; we arrive at all stages of life later than other mammals.

人类发育较缓——在生命的各个阶段，我们都晚于其他哺乳动物。

Whales are mammals that live in the sea.

鲸是生活在海洋中的哺乳动物.

Mammals damage orchards on every continent by girdling roots.

哺乳动物在各地对种子园的危害是咬断根系.