Because identical twins come from a single fertilized egg that splits into two, they share virtually the same genetic code.

由于同卵双胞胎来自于一个分裂成两个的受精卵，他们实际上共享相同的遗传密码。

During diapause, a young kangaroo stays in the female's pouch and growth of a second fertilized egg inside the uterus is delayed.

在滞育期间，小袋鼠呆在雌袋鼠的育儿袋里，因而推迟了子宫内第二个受精卵的发育。

If it is mild pain is normal, because the fertilized egg will produce such bed feeling.

如果是轻微疼痛是正常的，因为受精卵着床会产生此种感觉。

Biology has a pretty good understanding of how animals develop from a fertilized egg to a fully formed organism.

生物学对动物是怎么从一个受精卵发展一个完全成形的有机体有一个相当好的理解。

These may be signs or symptoms of a miscarriage or an ectopic pregnancy - when the fertilized egg implants outside the uterus, usually in a fallopian tube.

这些可能是流产或者宫外孕(受精卵在宫腔外着床，通常为输卵管)的症状。

Problems such as how a child learns language or how a fertilized egg becomes an organism are horrendous in practice and may never be solved completely.’ [emphasis added].[18]

像诸如一个孩子如何学习语言或一个受精卵如何变成生物体这样在实际中难缠的问题也许永远也不可能完全解决。

The fried egg jellyfish, also known as medusa, produce eggs that are fertilized in sea water, which then develop into a tiny larva fixed to sea bed organisms.

煎蛋水母，也被称为美杜莎水母，它的卵在海水中受精，然后发育成固定在海床有机体上的微小幼虫。

When the egg is fertilized, the substances become active and, presumably, govern the behavior of the genes they interact with.

当卵子受精时，这些物质变得活跃起来，并可能控制与它们相互作用的基因的行为。

But they never developed properly, largely because of defects in parts of the egg outside the fertilized nucleus.

但是这些卵细胞却不能正常发育，其原因主要是受精核外部的部分卵细胞有缺陷。

A hen typically lays an egg a day, whether it is fertilized or not.

在通常情况下，不论鸡蛋是否受精，一只母鸡每天会产下一只鸡蛋。

Balut, or half-fertilized duck or chicken egg, eaten in Asia with a pinch of salt - literally.

鸭仔蛋，即孵化到一半的鸡蛋或鸭蛋。在亚洲，人门撒一撮盐在上面，就开始吃——千真万确。