One man wrote his will on an envelope, another on the door, and a third on an egg.
有一个人把他的遗嘱写在一个信封上，另一个人写在门上，第三个人写在鸡蛋上。
2
A donor cell is fused to the egg by pulses of electricity, which break down the donor cell's outer membrane and allow the egg to envelope its new nucleus.