mammals

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.

When did mammals appear on the earth?

地球上的哺乳动物起源于何时？

Mammoths were herbivorous mammals.

猛犸是食草性哺乳动物。

Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in general seem to sleep very little.

海豚、鲸鱼以及水生哺乳动物睡眠都极少，这一事实可以给睡眠的根本功能提供有用的线索。

Bio-logging technology and its applications on aquatic mammals

水生哺乳动物信标跟踪记录技术及其应用

Whales are classified as mammals rather than fish.

鲸属于哺乳类而非鱼类。

Whales are mammals that live in the sea.

鲸是生活在海洋中的哺乳动物.

Any of various small whales, porpoises, or similar aquatic mammals, especially a whale of the genus mesoplodon, having a pointed snout.

啄鲸一种小型鲸、海豚或类似的水生哺乳动物，尤指啄鲸属的一种有尖啄的鲸鱼。

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.

Most mammals live on land.

大多数哺乳动物生活在陆地上.

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.

Marine mammals generally swim with the current.

海洋哺乳动物一般顺水而游。

As the only mammals clever enough to have mastered self-powered flight, the speedy daredevils offer a different technological inspiration compared to birds and flying insects.

作为唯一一个拥有自主充电飞行器的聪明的哺乳动物，和其他的鸟类以及飞行类的昆虫相比，这些迅速的冒失鬼们给我们带来了不同寻常的科技灵感。

The zoology of whales and related aquatic mammals. The affinities of all the beings of the same class have sometimes been represented by a great tree.

鲸（类）学研究鲸和与其有亲缘关系的水生哺乳动物的动物学同一纲内一切生物的亲缘关系，常常可用一株大树来表示。

No mammals other than people may enter the country without lengthy quarantine.

除人之外，所有的哺乳动物进入这个国家都必须经过长期隔离。

The global picture is worst for freshwater creatures such as amphibians, river fish and mammals, with average population declines of 76 per cent between 1970 and 2010, says the latest data available.

从全球来看，淡水生物如两栖动物、淡水鱼和哺乳动物等的状况更糟，最新数据显示，1970年至2010年间其平均数量减少了76%。

It has been suggested that mammals took over from dinosaurs 65 million years ago.

有人提出哺乳动物是在6500万年前取代恐龙的。

Whales belong among the mammals.

鲸鱼属于哺乳动物.

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。

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.

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.

Carnivores are usually socially complex mammals.

食肉动物通常是有着复杂的社会关系的哺乳动物。

Mammals weighing sixty kilograms have an average brain size of 200 cm2 ．

体重60公斤的哺乳动物的平均大脑面积为200平方厘米。

Most mammals are diphyodonts.

大部分哺乳类动物有乳齿及永久齿之别.

placental mammals

胎盘哺乳动物

Any of numerous marine mammals that come on shore to breed; chiefly of cold regions.

众多的上岸繁殖的水生哺乳动物；主要生活在寒冷水域。

Suckling is an instinct in mammals.

哺乳是哺乳动物的本能.

The boa feeds on birds and small mammals.

蟒主要吃鸟和小的哺乳动物.

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.

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.