viviparous

胎生的；直接生下幼体而非产卵孵化,如大多数哺乳动物、一些爬行动物和少数鱼类。

Being born alive, as are most mammals, some reptiles, and a few fish (as opposed to being laid as an egg and subsequently hatching, as do most birds and many other species).

产活体幼崽(而非卵)

producing living young (not eggs)

从胚胎直接发育而来(而非从真正的种子萌发)。

Arising from an embryo that develops from the outset (rather than from a true seed that then germinates).