kindsn.同类的人(或事物)；种类；kind的复数；
例如These kinds of questions often appear in the exam.
Human beings are genetically programmed to learn certain kinds of language.
人类生来有学习某几种语言的遗传因素。
She enjoys all kinds of music, as I do.
她和我一样什么音乐都喜欢。
They sell all kinds of things.
他们出售各种各样的东西。
