Their eggs are very tough .

它们的卵十分坚硬。

Other males started touching the eggs .

其他的雄鱼也开始触碰这些卵。

Each cat received 30 to 50 eggs .

每只猫注入30-50个受精卵。

Can you take eggs from a dying woman ?

可以从垂死的妇女体内摘取卵子吗？

Sometimes he took eggs from albatross nests .

有时他还会从信天翁的巢里掏鸟蛋。

Their eggs take 20 days to hatch .

它们的蛋要花20天时间来孵化。

And as a result they produced a quarter fewer eggs .

结果它们少生产了四分之一的卵子。

She is also willing to sell me her eggs for 10000 .

她也愿意以一万英镑出售给我她的卵子。

Regulations currently forbid scientists from implanting such eggs into patients .

现有的法规禁止科学家将这样的卵子植入患者体内。

She focuses on the cloning human embryonic stem cells using animal eggs .

沈现从事于用动物卵细胞克隆人类干细胞。