n.体弱,虚弱,疾病,病症
Bad temper is his worst infirmity.
坏脾气是他最大的弱点.
Old age and infirmity had begun to catch up with him.
他开始显出年老体衰的样子了.
We all fear disability or infirmity.
我们都害怕伤残或体弱。