micropycnometer

例句：

1. 1.The micropycnometer was used to measure the density of the liquid.
   微量天平被用来测量液体的密度。
2. 2.The micropycnometer was used to analyze the composition of the sample.
   微量天平被用来分析样本的成分。
3. 3. The micropycnometer was used to determine the weight of the sample.
   微量天平被用来确定样本的重量。