How to make a function wait for the completion of a callback?
如何为一个回调函数完成使等待？
This system consists of hardware and software with the completion of the corresponding function.
本系统由软、硬件配合，完成相应的功能。
This system consists of hardware and software with the completion of the corresponding function.
本系统由软、硬件配合，完成相应的功能。
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