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

1.蝙蝠是唯一有翅膀且能持续飞行哺乳动。

2.Whales are mammals that live in the sea.

2.鲸是活在海洋中哺乳动。

3.The whale is the largest mammal in creation.

3.鲸鱼是所有哺乳动中最大。

4.The boa feeds on birds and small mammals.

4.蟒主要吃鸟和小哺乳动。

5.Defensin is a widely existed antimicrobial peptide in plants, insects and mammals.

5.防御素是一种广泛存在于动植界抗菌肽。

6.In regard to animals, Diphyodont evolved into Reptilia, which evolved into mammals.

6.动是由两栖进化为爬虫，再进化为哺乳类。

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

7.海洋里有诸如鲸鱼和海豹类海哺乳动。

8.Suckling is an instinct in mammals.

8.哺乳是哺乳动能。

9.Birds differ from mammals.

9.鸟类与哺乳动不同。

10.Most mammals are diphyodonts.

10.大部分哺乳类动有乳齿及永久 齿之别。

11.Most mammals live on land.

11.大数哺乳动活在陆地上。

12.Whales belong among the mammals.

12.鲸鱼属于哺乳动。

13.The function of a mammal's fur is to insulate the body.

13.哺乳动皮毛功能在于使身体保温。

14.Forests are important habitats for birds and, in temperate forests, small mammals which inhabit the dense understorey.

14.森林对鸟类来说是重要栖息地，而且在温带森林里，小型哺乳动居住在稠密森林下层。

15.There is a close analogy between the gills of a fish and the lungs of a mammal.

15.鱼鳃与哺乳动肺很相似。

16.Last December scientists announced the probable extinction of the first mammal because of climate change: the white lemuroid possum, now gone from Queensland, Australia.

16.2008年12月，科学家宣布第一个可能因气候变迁而灭绝哺乳类：白狐猴负鼠，已经从澳洲昆士兰消失了。

17.The north of zhungeer is the main district of Central Asia desert mammal population and the mammal in Altai is north subfrigid zone coniferous forest pattern.

17.摘要准噶尔盆地北沿与阿尔泰山地兽类,山区以北方针叶林型动群为主,平原以中亚荒漠型动群居,广布种掺杂其间。

18.Eusocial colonies are common among insects such as bees and ants, but the only examples in the mammal world are among furry and the naked mole rats.

18.群居族群现象在如蜜蜂和蚂蚁等昆虫世界中很常见，但在哺乳动中，只有毛鼹鼠和裸鼹鼠会是这样。

19.Schistosome infected people or other mammals from the discharge of faecal egg, if manure contaminated the water, eggs were brought into the water, hatched miracidium in the water.

19.感染血吸虫人或其它哺乳动从粪便中排出虫卵，若粪便污染了水，虫卵被带进水中，在水里孵出毛蚴。

20.LDH-C4 is specific to mature testes and spermtozoa of bird and mammal.It is related to metabolic processes that provide energy for motility and survival of spermtozoa.LDH-C4 is an autoantigen.

20.摘要精子特异性乳酸脱氢酶特异地存在于鸟类和哺乳类动成熟睾丸和精子中，为精子运动和存活提供能量。