back signal

基本解释

Two methods, manual backing off and capacitor coupling (by cutting off the d. c. component) are usually used to measure a small transient signal superposed on a large electric current.
在测量强电平上迭加的瞬变微弱信号时，常采用手动调节补偿电平和电容隔直两种方法。

Monitoring can be switched to listen to your recording signal against your backing track without incurring off-putting latency introduced by your music software.
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From this point of view, backing down on the PCA will send a dangerous signal to the Kremlin that the EU does not have the willpower to stand up to foreign adventurism.
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And, I contend, the signal moment when momentum stalls is usually when imaginative, brand-backing investment stalls .
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