He smiled and I smiled back. As you do.

他微笑，我也报以微笑。真所谓礼尚往来。

《牛津词典》

The girl smiled and I smiled.

那女孩笑了，我也笑了。

youdao

I smiled, and then you smiled.

我笑了，然后你也笑了。

youdao

I smiled to myself and said "But some people say that he is as good a judge of wine as you are."

VOA: special.2009.02.07

They smiled. I pointed my finger at them and said, " If you keep this up, you'll both go crazy but let me know what happens as you go along."

他们笑了，我指着他们说“,如果你们继续这样，你们都会疯的,但你们继续的时候得让我知道“

耶鲁公开课 - 1945年后的美国小说课程节选

I smiled to myself and stopped working so that I could better enjoy listening to the noise.

VOA: special.2009.02.07

" I smiled, and she added, "It's a good thing no one overheard me.

NPR: Excerpt: 'Hungry for Paris'

This time, however, I smiled when she finished and went back to loading my car.

FORBES: Why Anybody Can Be Conned, Even You

The punches felt so good I smiled.

NPR: Boxer Muhammad Ali Turns 65