什么是晶体振荡器的Frequency Drift（频率漂移）？

答：Frequency Drift（频率漂移）指的是晶体振荡器频率随时间推移而发生的我们并不希望的渐进变化。

An undesired progressive change in frequency with time. Frequency drift can be caused by instability in the oscillator and environmental changes, although it is often hard to distinguish between drift and oscillator aging. Frequency drift may be in either direction (resulting in a higher or lower frequency) and is not necessarily linear.

频率随时间变化而产生的我们不希望的渐进变化。频率漂移可能是由振荡器的不稳定性和环境变化引起的，尽管通常很难区分漂移和振荡器老化。频率漂移可能是在任何一个方向（导致更高或更低的频率），并不一定是线性的。