Picknometer,pycnometer
[化] 比重瓶; 比重管
🗣️ 情景例句
Keep a small English dictionary with you at all time.
随身携带一本小英文字典。
Congratulations on your success in the election.
我恭喜你当选了。
Just now we all watched you sign to show that you had received the cheque.
刚才我们大家都观察到了你为表明已收到那张支票而签名。