锻炼和健康饮食减少患心脏病的几率。

Exercise and a healthy diet ___lessen the chance of heart disease.

加强腿部力量能减轻膝盖的压力。

Strengthen the legs and it ___lessens the strain on the knees.

我相信您会减轻我们的失望。

I am sure that you will ___lessen our disappointment.