在大多数前工业化国家，不同资源分配的问题是通过长途贸易网络解决的，而终端消费者对长途贸易网络的控制很少。
In most of the preindustrial world, the problem of different resource distribution was resolved by long-distance trade networks over which the end consumer exercised little control.
当您登录并分配到一个用来键入的终端设备(该终端成为Shell的标准输入)时，您将被指定为该设备的所有者，而tty成为组所有者。
When you log in and are assigned a terminal device to type in (the terminal becomes standard input for your shell), you're made the owner of the device, and tty becomes the group owner.
移动终端的速度对有效的切换、高效的动态信道分配、自适应调制、功率控制、均衡等无线应用都是必不可少的信息。
The knowledge of the velocity of the mobile terminals is essential in adequate handoff control, efficient dynamic channel assignment, adaptive modulation, power control, equalization, etc.
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