我小的时候,妈妈就告诉过我:“人是由爸爸提供的精子和妈妈提供的卵子相遇后产生的。”自从听了妈妈的话,各种疑问不断在我脑海里浮现:“精子和卵子是通过什么办法相遇的?”“通往卵子的通道万一堵塞住了,精子还有什么办法进入卵子?”“有的精子进不了卵子怎么办?”好几年了,我都没有找到答案。 When I was young, my mother told me: “People are produced by the father’s sperm and egg provided by the mother.” “Since listening to my mother, various questions continue to emerge in my mind: ” Sperm and the egg is the way to encounter? “” The passage to the egg in case of blockage, the sperm have any way to enter the egg? “” Some sperm can not enter the egg how to do? I have not found the answer.