哺乳动物的

Primitive oviparous mammals found only in Australia Tasmania and New Guinea .

只在澳大利亚塔斯马尼亚岛和新几内亚发现的原始卵生哺乳动物。

Although bees, ants and some fish and reptiles reproduce without having sex in a process known as parthenogenesis, it was thought to be impossible in mammals.

尽管蜜蜂、蚂蚁和一些爬行动物通过孤雌生殖进行繁殖，但哺乳动物被认为是不可能进行这种生殖的。

It is important in the formation of the umbilical cord and placenta in mammals.

对哺乳动物脐带和胎盘的形成有重要作用

The platypus is one of the only two existing egg-laying mammals in the world.

鸭嘴兽是世界上仅存的两种产卵哺乳动物之一。

Platypus venom is a very small number of self-defence by one of the mammals.

鸭嘴兽是极少数用毒液自卫的哺乳动物之一。

About 70% of North American large mammal species were lost at the end of the Pleistocene epoch.

在更新世快要结束的时候（距今2万-1万年），很多种大型哺乳动物从北美消失。

Any of various extinct elephantlike mammals of the genus Stegodon and related genera, of the Pliocene to the Pleistocene.

剑齿象任一种剑齿象属及相关属的已灭绝象形哺乳动物，存在于上新世到更新世

The skunk, or polecat, is actually an attractive little mammal and some people keep them as pets.

抽鼬也叫臭猫，是一种很漂亮的小型哺乳动物，有人还把它们作为宠物饲养。

Rare instances of polyploid mammals are known, but most often result in prenatal death.

已知的多倍体哺乳动物非常罕见，而且往往大多数导致产前死亡。

The porpoise is one kind of ability is outstanding, in the intelligent clever sea the mammal.

海豚是一种本领超群、聪明伶俐的海中哺乳动物。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐