用户可以根据此项操作来查看电子邮件、智能卡、条件接收等信息。
The user may check information of E-mail, smart card and conditional access by this operation.
接收请求后，仅当满足条件时，原则才有效。
Once receiving a request, a principle is valid only when its condition is satisfied.
函数接收的参数可能有错，前置条件没有满足。
There is something wrong with the arguments the function is getting; a precondition is violated.
函数接收的参数可能有错，前置条件没有满足。
There is something wrong with the arguments the function is getting; a precondition is violated.
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