Digitally displays capacity, voltage, time elapsed and current.

数字显示容量，电压，时间和电流。

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In addition, the average frame rate is calculated, based on the current elapsed time and the total number of rendered frames.

另外，将基于当前的运行时间和所呈现帧的总数来计算平均帧速率。

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Sets the period of time to wait for the associated process to exit, and blocks the current thread of execution until the time has elapsed or the process has exited.

设置等待关联进程退出的时间，并在该段时间结束前或该进程退出前，阻止当前线程执行。

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