unsetting

this destructor would have to be called specifically before unsetting the parent class reference.

这种解构器必须在解除父类引用之前进行调用。

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the first step is to make sure that the user is logged out by unsetting the relevant session variables.

第一步，确保用户是通过取消相关会话变量来进行注销的。

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torture-test an application by setting and unsetting a bunch of values of different types for keys on the command line.

通过在命令行上为键设置和取消设置各种不同类型的值，对应用程序进行严格的测试。

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a type of mechanism commonly used in the setting and unsetting of downhole tools and equipment such as packers.

在坐封和释放井下工具和设备（如封隔器）中普遍使用的一种机构。

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