I think you'll find this useful and relating to the world in any kind of situations.
你会发现这类句型特别有用,能够在任何场合中派上用场。
Sometime later, I will deal with functions of more than one variable, which I will briefly introduce to you, because that may not be a prerequisite but certainly something you will learn and you may use on and off.
再过段时间,我要开始处理多变量函数,到时候我会向你们进行简单介绍,因为那不是必须的,但是你们以后会学到,有时候还能派上用场
and it's something that you can really put into practice in many situations.
它能在许多语境中派上用场。
It's very simple, very useful.
这既简单,又非常派得上用场。
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