bit pressuredrop

例句：

1. 1. The pressure dropped significantly after the valve was opened.
   阀门打开后，压力显著下降。
2. 2. The pressure drop is a measure of how much air is being released from the tank.
   压力下降是衡量从油箱中释放空气的量的一个指标。
3. 3.The pressure drop in the pipeline is due to the expansion of the gas.
   管道中的压力下降是由于气体膨胀造成的。