| 释义 |
This is a book about human reproduction.这是一本关于人的繁育的书。This kind of apple has been grown for generations.这种苹果已繁育好几代了。Some cultivars root readily from cuttings but most must be grafted.一些栽培品种很容易通过插条繁育，但大多数必须通过嫁接。All beings are probably produced by a similar mode of generation, depending on the concourse of the two sexes.所有生物很可能都以相似的方式繁育，都依赖于两性的交合。 |