Smokometer
烟密度计, 烟尘计
🗣️ 情景例句
Yes. This is Richard Stewart.
是的。我是Richard Stewart。
I'm sorry,but both of them are busy right now.
很抱歉他们现在很忙。
After making a short test flight at 4,15 a.m.,
布莱里奥凌晨4点15分作了一次短距离试飞，