In a weak moment, I told him the truth.

我一时心软, 告诉了他真相.

《简明英汉词典》

In a weak moment, I agreed to pay for her holiday.

我一时心软同意了支付她度假的费用.

辞典例句

For a weak moment she almost relented.

在意志薄弱的一刻,她差点儿动了恻隐之心.

互联网

I never considered a wisdom man being ill, and have the weak moment.

但没想到智慧的人也会生病, 也会有脆弱的时候.

互联网