set their heart at rest

• vt. 安心(放心)

set their heart at rest的用法和样例：

例句

用作及物动词 (vt.)

1. At last he has settled to his work in earnest.
   最后他安心认真地干起他的工作来。
2. He will not rest until he knows the truth.
   他要了解真实情况之后才会安心。