Picknometer,pycnometer
[化] 比重瓶; 比重管
🗣️ 情景例句
Are we picking him up at the station?
我们要去车站接他吗？
Why didn't you like hard work so much?
为什么你那么不喜欢好好工作？
In the contrary school, the duck is supreme.
与滑翔鸟相对的另一类鸟中，数野鸭本领最高。