Every time you require input from the user, a grammar specifying the valid utterances for that interaction must be identified.

每次您要求用户输入时，必须标出为该次交互规定有效话语的语法。

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Additionally, many Web sites do not want to maintain, or require users to continually provide, the same profile-related information just to ensure that the user credentials are valid.

另外，许多Web站点不愿意自行维护用户个人信息，也不愿意要求用户提供这些信息。

youdao

Additionally, many Web sites do not want to maintain, or require users to continually provide, the same profile-related information just to ensure that the user credentials are valid.

另外，许多Web站点不愿意自行维护用户个人信息，也不愿意要求用户提供这些信息。

youdao