Using last week's principle of the scientific method, you should change only one variable at a time.

利用上周科学方法的原则，你每次只能改变一个操纵变因。

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Sensitivity analysis allows you to consider the effect of changing one variable at a time.

敏感性分析允许你考虑一次改变一个变量造成的效果。

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If the priority is less than the integer variable console_loglevel, the message is delivered to the console one line at a time (nothing is sent unless a trailing newline is provided).

如果优先级小于整形变量console_loglevel，那么一次将会只发送一行消息到控制台中(除非遇到一个换行符，否则将什么都不会发送)。

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