His digestion had been impaired by his recent illness.由于近期的疾病, 他的消化能力减弱了。

Consumption of alcohol impairs your ability to drive a car.饮酒会降低你开车的能力。

when a person's mental faculties are extremely impaired当一个人的智力严重受损时

The blast left him with permanently impaired hearing.爆炸使他的听力永久受损。