Micropicnometer
[化] 微量比重瓶
🗣️ 情景例句
Mr. Carlson is busy at the moment. May I help you?
Carlson先生现在正忙着呢。我可以为你效劳吗？
How many feet are you going to use?
你要用几英尺？
You did right.
你做得对。