"重获信心"的英文表达是 "regain confidence"。这个短语的来源是由 "regain" 和 "confidence" 两个单词组成的。

"Regain" 是动词,意思是 "重新获得" 或 "恢复"。"Confidence" 是名词,意思是 "信心"、"自信" 或 "信任"。所以 "regain confidence" 的意思就是 "重新获得信心" 或 "恢复信心"。

下面是一些使用 "regain confidence" 的英文例句,并附上中文翻译:

After faipng the test, I worked hard and regained confidence in my abipties. (在考试失败后,我努力学习,重新获得了对自己能力的信心。)
She gave a great speech and regained the confidence of her team. (她做了一场很棒的演讲,恢复了团队对她的信任。)
He lost confidence in himself after his business failed, but he was able to regain it through hard work and determination. (他的生意失败后失去了自信,但他通过努力和决心重新获得了自信。)