molecular speed measurement

例句：

1. 1.The molecular speed measurement is crucial for understanding the structure of matter.
   分子速度测量对于理解物质的结构至关重要。
2. 2. The research team conducted a molecular speed measurement to study the reaction mechanism.
   研究团队进行了分子速度测量，以研究反应机制。
3. 3.The molecular speed measurement was used to determine the rate of diffusion in the liquid.
   分子速度测量被用来确定液体中扩散速率。