Gasdynamic
laser气动激光器,气体动力激光器
🗣️ 情景例句
I don't know. The baby-sitter says she has a stomachache,
我不知道。临时保姆说她肚子疼.
Who wrote that song?
那支歌曲谁写的？
I can't understand why he is being so selfish. He isn't usually like that.
我不明白他此刻怎么这么自私。他平时不这样。