Smokemeter
n. (用以測定煙霧的濃度或成分的)煙度計
??? 情景例句
I've been studying all day, and I'm sick and tired of it.
我學了一天，現在感到厭倦。
They bray most that can do least.
說話最多的人，能做的事最少。
Is it a black one?
是快黑的嗎？