The dynamic modification of a user interface to only show actions that the user is entitled to perform is often regarded as an aspect of authorization.
动态修改用户界面，以仅向用户显示其能够执行的操作，这样的做法常常也被视为授权的一个方面。
The EIA Standard RS-422-A entitled "Electrical characteristics of Balanced Voltage Digital interface circuits" defines the characteristics of RS-422 interface circuits.
已授权的“平衡电压数字接口电路的电气特性”EIA RS - 422 - A标准定义了RS - 422接口电路的特性。
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