他又变得出奇的冷静，微笑着，似乎什么都没有发生过一样。

He was marvellously cool again, smiling as if nothing had happened.

《柯林斯英汉双解大词典》

我们必须继续下去，只当作什么都没有发生过。

We must try to carryon as if nothing had happened.

youdao

经过流血争斗之后，他去了学校，好像什么都没有发生过一样。

After the bloody fight, he went to school as if nothing had happened.

youdao