Picknometer,pycnometer
[化] 比重瓶; 比重管
🗣️ 情景例句
Robbie, the dinner was terrific.
Robbie，晚餐真是棒透了。
I took 6 boxes of biscuits.
我拿了六盒饼干。
It is because his feet move on, but his head stays still.
这是因为他的脚动了，而他的头保持着静止。