Photelometer
[医] 光电比色计
🗣️ 情景例句
Are you a Republican, or a Democrat?
你是共和党人还是民主党人？
We must listen carefully to the teacher.
我们必须注意听老师说的话。
One had winter we watched the river creep up the lower meadows.
有一年冬天，天气不好，我们眼看着河水浸没了地势较低的草场。