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。

The second function, testing, is okay if you want to compare your knowledge with other people.

第二个功能，测试，如果你想和其他人比较你的知识是可以的。