rate of vacuum drop

例句：

1. 1. The rate of vacuum drop is a crucial factor in determining the efficiency of the vacuum system.
   真空下降率是决定真空系统效率的关键因素。
2. 2. In this experiment, we measured the rate of vacuum drop to understand the behavior of the gas molecules.
   在这个实验中，我们测量了真空下降率，以了解气体分子的行为。
3. 3. The rate of vacuum drop can vary depending on the type of material being processed.
   真空下降率可以根据正在处理的材料类型而变化。