If $userchoice is false (see Table 1), then Perl checks the value of $systemchoice and so on until it gets to the last value, which is always used, whether it's true or not.

如果 $userchoice 为假（请参阅表 1），那么 Perl 就需要检查 $systemchoice 的值，依此类推，直到最后一个值，这个值通常都会被使用，不管它是真还是假。

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This routine checks some of the fields in the form and collates the errors, and prevents the form from being submitted by returning false.

这个例程检查表单中的一些域并整理错误，还通过返回false防止表单被提交。

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By default, when a validator returns false, the remaining validation checks are aborted, but that parameter is also configurable for each individual validator.

默认情况下，如果一个验证器返回false，则剩余的验证检查都将取消，但这个参数也可以对单个验证器进行配置。

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Company officials created false documents, such as invoices, customer checks and account statements to verify business activity that never occurred or existed.

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State reinforcement of federal penalties for providing false information when buying a gun, running background checks on buyers at gun shows, allowing local discretion to police when issuing concealed-carry permits, requiring purchase permits for handguns and allowing municipalities to set their own gun laws are all associated with lower gun-trafficking rates.

ECONOMIST: Guns and state borders

False alarms lead to "complacency" among businesses and prevent vital safety checks, crews said.

BBC: False 999 calls cost fire crews millions