1、 在各种……之中，…… among various kinds of …, … /= of all the …, …
例︰在各种运动中我尤其喜欢慢跑。
among various kinds of sports, i like jogging in particular.
2、 就我的看法……;我认为……
in my opinion, …
3、不用说…… it goes without saying that …
= (it is) needless to say (that) ….
= it is obvious that ….
例：不用说早睡早起是值得的。