difference of phase的用法和樣例：
例句
- In practice there are three methods of accomplishing this phase difference.
在實(shí)踐中有三種方法來(lái)獲得相位差。 - A frequency tracking method is proposed.The synchronism sampling is achieved to improve the measuring precision of frequency and phase difference.
本文提出一種頻率跟蹤方法，可以在不過(guò)零開(kāi)始采樣的情況下，實(shí)現整周期采樣，保證頻率和相位差測量的精度。
