Kapnometer
烟密度计
🗣️ 情景例句
I'm a freelance photographer.
我是自由摄影师。
One cannot eat one's cake and have it.
事难两全其美。
An Indian came into the waiting room, and walked quickly to the doctor's door.
一个印度人走进候诊室，快步朝医生的门口走去。