The air exited tunnels with a sonic boom that could be heard 400 meters away.

空气离开隧道时会发出音爆， 400 米外都能听到。

In addition, pulmonary function testing can be used to measure how quickly air exits the lung, which can be slower than normal.

除此之外，肺功能测试可用于衡量空气离开肺部的速度，患者会比正常更慢一些。