But while the Python interpreter is running an application, Psyco sometimes checks to see if it can substitute some specialized machine code for regular Python bytecode actions.

但是当Python解释器运行应用程序时，Psyco会不时地检查，看是否能用一些专门的机器代码去替换常规的python字节码操作。

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Personal connections may give comfort, but are no substitute for true institutional checks or true experience of a man's character, which many of Mr. Madoff's clients seemed not to have.

WSJ: Put Madoff In Charge of Social Security

There is no substitute for an entrepreneur remaining in touch with his or her business, and practicing effective checks and balances in the business.

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