破涕为笑的英文：
[Literal Meaning]
break with/tears/become/smile
to smile through tears

[解释]
一下子停止了哭泣笑了起来。形容转悲为喜。

[Explanation]
to change from sadness to happiness

[例子]
小姑娘看到爸爸给她买的新玩具后破涕为笑，忘记了刚才摔跤的疼痛。

[Example]
On seeing the new toys bought by her father, the little girl changed from sadness to happiness and forgot the pain caused by falling down.

[英文等价词]
hang one's harp on the willows