Optical device
[电] 光学装置
🧩 词语组成解析
🗣️ 情景例句
I'm dieting to keep my figure.
我正在节食以保证身材。
Take one's courage in both hands.
勇往直前，敢作敢为。
At night, when you really wish to go to sleep, you rarely manage to do so.
到了夜晚，你真想睡了，却很难入睡。