A: I've been worried about the examination results all afternoon.

我整个下午都为考试结果担心。

B: Don't be silly. I think you must have passed.

别傻了，你一定会通过的。

A: I'm not sure.

我没把握。

B: You can call the teacher to ask about it and it will put your mind at rest.

你可以打电话问问老师，那样的话你就放心了。

put one's mind at rest

使某人安心、放心

The doctor's reassurance put my mind at rest about the surgery.

医生的安慰让我对手术放心。

I know you're anxious to hear how your father is doing after the surgery, so let me put your mind at rest. He's going to make a full recovery.

我知道你急于想知道你父亲手术后的情况，所以我告诉你，他会完全康复的，这样你会放心了。

After installing a home security system, the homeowner was able to put his mind at rest about potential break-ins when he was away on business trips.

在安装了家庭安全系统后，房主能够在出差时放心，不再担心可能的入室盗窃。

put one's mind at rest

相近表达

Settle someone's nerves - 使某人平静下来

例：The warm welcome from the host settled the guests' nerves as they entered the party.

主人热情的欢迎让客人们在进入派对时平静下来。

Relieve someone of their worries - 解除某人的忧虑

例：The financial advisor relieved the couple of their worries about retirement planning.

财务顾问解除了这对夫妇对退休计划的忧虑。

Soothe someone's concerns - 缓解某人的担忧

例：The manager soothed the employee's concerns about job security during the company meeting.

经理在公司会议上缓解了员工对工作保障的担忧。

Lay someone's fears to rest - 消除某人的恐惧

例：The doctor's positive prognosis laid the patient's fears to rest regarding the surgery outcome.

医生乐观的预后消除了病人对手术结果的恐惧。