According to Chinese traditional medicine, start of summer is a key time to moisten the heart.

中医认为，立夏是滋润心脏的关键时刻。

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Students should develop the key skills before they start a project.

在开始项目之前，学生应该学习关键技能。

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That asymmetry is key, and though it doesn't yet provide the key to superconductors, it is a significant start.

这种不对称性十分关键，尽管它还不能给超导体提供解决办法，但却是个重要的开始。

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Now the modulation--change of key from major to back to minor as the cortege will start up again and then we-- A nice clarinet sound there and here comes our cortege with the bass.

现在变调了,从大调,变回小调,送葬行列再次启动,然后我们听到了优美的单簧管,送葬行列伴随着低音来了

耶鲁公开课 - 聆听音乐课程节选

Imagine I have a little lamp, a little goose- one of those little gooseneck lamps, I'd put it on the table here, I'd put the height about a f-- about a foot off the table. And if I was really good, - I could hit, or time it so that when I hurt- yeah, try again. When I turn this on switch on in the lamp, at exactly the same time, I'm going to hit a key on my computer and start it running.

想象下我有一个那种小雁颈台灯-,我把它放在桌子上，大概离桌子，有一英尺那么高吧,这样挺好的，我可以打开-,或者关闭这灯,并在这同时，我可以让我电脑,开始运行。

麻省理工公开课 - 计算机科学及编程导论课程节选

Most likely, you needed help--a knife and a spoon to eat your breakfast, a key to start your car, a computer to read these words.

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After a low-key start, Didier Drogba rolled the ball into an empty net after David James kicked at thin air.

BBC: Portsmouth 0-5 Chelsea

Having a designer or someone with some knowledge of design is a key part of a founding Internet start-up, said Garry Tan, designer-in-residence at Y Combinator and co-founder of blogging company Posterous.

FORBES: Design For Facebook, Mint, Posterous Not Just Pretty Pixels