Picknometer,pycnometer
[化] 比重瓶; 比重管
🗣️ 情景例句
Two heads are better than one.
三个臭皮匠胜过一个诸葛亮。
The adventure had been planned for quite a while.
那项冒险曾经作了长期的周详计划。
The cloud will lift quite quickly.
云很快就会消散的。