Sand tiger shark eggs develop and hatch inside their mother's oviducts at different times.

沙虎鲨的卵会在不同时间段在母亲的输卵管和孵化。

It starts with an unfertilized egg cell, added to a blob of yolk, and squeezed down a stretchy tube called an oviduct.

它始将未受精的卵细胞添团卵黄并挤压个称为输卵管的弹性管。

When the hatchlings run out of yolk from their own eggs, they eat the other eggs and hatchlings until one baby shark from each oviduct remains.

当幼体用光了自己卵中的卵黄，它们就会吃掉其它卵和幼体直每个输卵管只剩下个小鲨鱼。