知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 ' As has been said above, the specific verb and the context make a difference, and discussing all of them in one thread would be too confusing. ps. It might be worth adding that a class refers most often to the group of pupils World health https://seitensprung89998.digitollblog.com/33580437/eine-unvoreingenommene-sicht-auf-techno