And why do you want the ovum?

你们要这颗卵子干什么？

You're saying the ovum ended up here by mistake?

你是因为失误 卵子到这来了？

Scientists take an ovum from a female of the species they're cloning and remove all the DNA from inside.

科学家从他们正在克隆的物种的雌性身上取出一个卵子，并从里面去除所有的 DNA。