我们想当然的认为越容易看懂就越容易记住。在学习和记忆方面，读起来不流畅的字体或是难看而引人发笑的字体反而是最好的。
Disfluent fonts, the ones people tend to laugh off, fonts that are comically ugly, they tend to be the best for learning and for memory.
连贯性：你的外贸开发信是否清晰明了、容易阅读、段与段之间的过渡自然、流畅？
Coherence: Does your letter clear enough and easy to read? Is the transition of the segments natural and smooth?
要想游出流畅的蛙泳并不是件容易的事。
Getting into the groove of a flowing breaststroke isn't always the easiest thing to do.
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