Both locks and keys record openings and denied entries, providing a detailed audit report.

电子锁和钥匙通过对系统放行和拒绝的记录，可以做出详细的审计报告。

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You can use volatile variables instead of locks only under a restricted set of circumstances. Both of the following criteria must be met for volatile variables to provide the desired thread-safety.

您只能在有限的一些情形下使用volatile变量替代锁。

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High levels of contention can occur on locks that are obtained frequently, held for a long time, or both.

以下三种锁会出现较高程度的争用：经常获取的锁，长期占用的锁，以及经常使用且长期占用的锁。

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The bike comes with a key which both locks the battery in place and enables the bike to be turned on.

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It also locks up resources, both human and financial, that could be used more productively by stronger firms.

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The public also has shown the desire for the tradition to cease, both because of the physical harm to the bridge and because many view the locks as an eyesore.

BBC: Paris to tourists: Stop locking down love