critical flow

例句：

1. 1. The engineers were analyzing the data to determine the critical flow rate for the pipeline.
   工程师们正在分析数据，以确定管道的关键流量。
2. 2. The critical flow rate is a crucial factor in determining the efficiency of the system.
   关键流量是决定系统效率的重要因素。
3. 3.The critical flow rate was determined by measuring the velocity at different points along the pipe.
   通过测量管道不同位置的速度来确定关键流量。