I'm simply saying swap X with Y, but this 2 won't work, because where are X and Y defined?

我只简单地说交换X和Y，但是这两行不起作用，因为X和Y是在哪里定义的呢？

哈佛公开课 - 计算机科学课程节选

Those people who simply won't work and won't seek work must be penalised for it.

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But there is a real chance the drugs in this class simply won't work.

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For real-time applications, averaging hundreds of readings simply won't work.

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