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abbr. intracavity CW difference frequency generation 内腔连续波差频振荡
🗣️ 情景例句
Please excuse me. I'm very sorry.
请原谅我， 我真的很不好意思。
What do economists say about the present crisis?
经济学家们对于现在的危机做何说法？
Do you like it?'
你喜欢它吗？