一个可执行的单元由每一个基本快开始，而与每行源代码相对应的指南与前面版本中的指南有所不同。

An executable unit begins at the start of every basic block and at any instruction that corresponds to a line of source code that is different than the previous instruction.

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这个基本算法可以被做的非常快。

This basic algorithm can be made to be very fast.

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组织一次“快闪”活动，基本上只需要用电子邮件通知一群人在某个地点出现一会儿，然后消失。

Organizing a "flash mob" basically involves e-mailing a bunch of people with instructions to show up at a certain place for a few moments, then disappear.

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