piston effect

• 活塞效应

piston effect的用法和样例：

例句

1. In addition, the piston effect of each train is weakened even counteracted with each other thus the natural ventilation performance of the piston effect will abate.
   两列车相向行驶时，各自的活塞效应会减弱甚至相互抵消，不利于区间隧道内的自然通风。