rough 粗糙的 roughly speaking 粗略的说 tough [tʌf] adj. 艰苦的，困难的；坚强的，不屈不挠的；坚韧的，牢固的；强壮的，结实的 n.
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粗略的说，可以把人类分成三类：辛苦到死，担心到死，以及无聊到死。
Broadly speaking, human being may be divided into three classes: those who are toiled to death, those who are worried to death, and those who are bored to death.
一个是所谓的相对原则，粗略的说，就是我们无法判断自己是否是静止还是在平稳的移动。
One is the so-called principle of relativity, which means, roughly speaking, that we cannot tell whether we are at rest or moving smoothly.
这里说粗略并非轻视，因为数千年来的语言哲学表明要建立自然语言真正严格意义上的模型是很难的(甚至是不可能的)。
The word sketchy here is not pejorative because millennia of philosophy of language have shown how hard (or even impossible) it is to come up with a truly rigorous model of natural language.
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