只要笑一笑，没什么事情过不了！用英语怎么说？

应该要意译
have a smile, tomorrow is another day.
笑一笑，明天又是新的一天。

That will not always be the case when you smile.

Smiling on face ,the case will not always be that .

Cracking a smile ,that will not always be the case.

just need Smile,nothing is impossbile.

Smiling on face ,the case will not always be that

jsut for a smile,

只要笑一笑,翻译为：Just laugh it off ,表示不把它放在心上，把它笑过。用笑驱除
只要笑一笑，没什么事情过不了！翻译为：Just laugh it off，and everything is possible!