Idfg
abbr. intracavity CW difference frequency generation 内腔连续波差频振荡
🗣️ 情景例句
Mrs. Stewart, may I have this dance?
Stewart太太，我可以请你跳这支舞吗？
The joy of the heart makes the face merry.
喜形于色。
Zhejiang, China
浙江，中国