On classroom, sometimes the thing that they play to have nothing to do with study even, say a few words that oneself remember suddenly.
在课堂上，有时他们还要玩和学习无关的东西，说一些自己忽然想起的话。
I'm always busy with my lessons. What I have to do everyday is nothing but study.
我总是忙于自己的功课。我每天除了学习还是学习。
Don't read such books as have nothing to do with your study.
不要读那些与你的学习无关的书。
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