Idfg
abbr. intracavity CW difference frequency generation 内腔连续波差频振荡
🗣️ 情景例句
Do you want manual or automatic transmission?
你的汽车想配备一个手动挡还是自动挡？
One ploughs, another sow; who will reap no one knows.
有的耕，有的播，谁来收获很难说。
There is no superior 'they' in the shape of managements and hotel hierarchies to darken his holiday days.
但在露营地里根本不会有管人的人上人"和酒店里的等级制度来使露营者的假日过得阴郁低沉。