The first bit of access control actually happens at login when a PAM module decides that Bob must log in to role cashier_r.
当PAM模块决定bob必须登录到cashier_r角色中时，将实际发生访问控制的第一部分。
We can administratively set properties and values on a mediation module, which can provide control over this mediation at run time.
我们能够以管理员身份在中介模块上设置属性和值，以便可以在运行时对此中介进行控制。
In the software project, PIC bottom program is used to collect the ECG data and control the AT injunction to the GPRS module, which realize the wireless transmission of ECG data.
通过单片机底层程序的设计，完成了对心电数据的采集和GPRS模块的AT指令控制，实现了对心电数据无线传输；
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