In a loop, a guard can have two special conditions tested against in addition to the standard Boolean test.

在一个循环中，除了标准的布尔测试外，一个约束能测试二个特定的条件式。

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The standard way to handle this problem is to check first to see if logging is enabled before constructing expensive logging messages. In other words, use a guard clause like Listing 1.

解决这个问题的标准方式是在构造昂贵的日志消息之前，首先检查是否启用了日志。

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Being the guard, academic editorial department should be on the duty to maintain academic standard.

作为学术“守门人”的编辑出版部门，在维护学术规范上有着义不容辞的职责。

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The fiduciary standard implies that rules and regulations will guard against fraud, bad investment advice, or excessive fees.

FORBES: Fiduciary Standard Sends The Wrong Message