Picknometer,pycnometer
[化] 比重瓶; 比重管
🗣️ 情景例句
And my father, Dr. Philip Stewart.
这是我父亲， Philip Stewart医生。
I invited him to come in, but he wouldn't.
我请他进来，但是他不肯。
Don't worry. I can help him.
不用着急，我来帮他。