When the form is posted, the value of this field is compared to the value of the authentication key in session, to verify that the form submission was valid.

当表单被提交时，系统将把此字段的值与会话中的认证密钥值相比较，以检验表单提交是否有效。

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The -bv flag will start Sendmail with a request to verify the user IDs provided in the Address parameter field of the command.

—bv标志启动Sendmail并请求确认命令的Address参数字段中指定的用户ID。

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Validation only tests that the data is in accordance with the rules identified for that field (syntactically correct); it does not verify the data against a second data source.

确认只测试数据是否与标识域的规则一致，（从语法上来说是正确的）；它不根据第二个数据源验证数据。

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