这种药物可以减轻头痛的症状。

This medicine ___mitigates the symptoms of headache.

他的及时补救措施减轻了这次失误的严重性。

His prompt remedial action ___mitigated the severity of the mistake.

多喝水可以减轻头痛的不适感。

Drinking plenty of water ___mitigates the discomfort of a headache.