但是服务器仍然要进行自己的有效性检查。

However, servers should still verify validity for themselves.

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登录模块可根据表1的矩阵来执行选项有效性检查。

The login module can perform validity checks on the options according to the matrix in Table 1.

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我们在表单 bean 中编写了一些有效性检查，如图29所示。

We coded some validation in the form bean, as seen in Figure 29.

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