These kinds of questions often appear in the exam.
这几类问题在考试中经常出现。
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。
I like all kinds of music from opera to reggae.
我喜欢各种音乐，从歌剧到雷盖都喜欢。
In crude terms, the causes of mental illness seem to be of three main kinds.
简略地说，导致精神病的原因看起来主要有三种。
