Picknometer,pycnometer
[化] 比重瓶; 比重管
🗣️ 情景例句
I'll take it. But the price is a bit high. How about free wrapping?
我买了。但价格有点高，免费包装怎么样？
Please don't bother me now.I'm very busy.
现在请别麻烦我，我很忙的.
Excuse me. How can I get to Bear Country?
对不起，到熊国怎么走？