The pain had lessened in the night, but so had his lucidity.

晚上他疼痛减轻，但神志不那么清醒了。

The sheer ferocity of the accident might have had lessened its environmental impact.

这起事故的严重程度本可以减轻其对环境的影响。

Still, the hazard ought to be further lessened.

这一危险仍应该进一步减少。

Yet that has not lessened the Yao Ming Effect.

但是这并没有削弱姚明效应的影响。

Lessen the child's fever lessened during the night.

那孩子的发烧在晚上减轻了。