Never microwave a whole egg without pricking the yolk with a toothpick to break the outer membrane.
用微波炉加热整个鸡蛋时，一定要用牙签把蛋黄刺破。
2
They are trying to find their way through the zona pellucida, the membrane that surrounds and protects the egg.?
它们试图找到通过保护卵细胞的透明带的路。
3
To check an egg for chromosomal abnormalities, doctors use a laser to make a small incision in the outer membrane, which allows them to extract the polar body and the chromosomes it contains.