Before using most information systems in the computers or the networks, the users must obtain relevant authorizations which always have time limit, such as entry password.

计算机或网络中的一些信息系统需要获得一定的授权才能使用，而且很多授权都有一定的使用期限，例如登录口令。

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This would require two steps, the entry of a password as well as another action.

BBC: Technology

No wireless LAN access point or complicated ID or password entry is required, and once pictures have been downloaded to the smartphone, it is simple to upload them to social networking sites.

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