Because clocking frequency of sending terminal is changed with times at lower cost and simple circuit, accuracy of receiving end sampled data and audio - data recovery is assured.

在发送端时钟频率随时间变化的情况下，以较低的成本和较简单的电路实现，保证了接收端采样数据及音频数据恢复的准确性。

youdao

Loughborough - which has a very large student population - does not rank so highly, clocking up a monthly average of just over 3, 000 illegal music downloads, the data indicates.

BBC: A glimpse at piracy in the UK and beyond