得出的结论是，机械式变极化器在反气象干扰中几乎无效。

Result obtained by this paper is that the mechanical polarization converter is invalid in anti weather-jam.

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当创建表以后，在建立索引，视图等。当删除表的时候，所有依赖于该表的对象都变的无效了，包括视图，包，包体，函数和存储过程。

Whenever you create a table, index, and view, and then drop the table, all objects dependent on that table are invalidated, including views, packages, package bodies, functions, and procedures.

youdao

如果用户名字中的任何地方输入“bob”，该指令变将控制器标记为无效(试试)。

It invalidates the control if the user enters "Bob" anywhere in the name (try it).

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