When I turned back, the little boy had vanished into thin air.

当我转回身时，那个小男孩已经消失得无影无踪了。

youdao

I just hesitated a moment; when I turned back to that shop, the shirt had been bought by others already.

就是因为稍有犹豫，当我转回那家店的时候，那件衬衣就被已经别人买走了。

youdao

When I told her what had happened she just grunted and turned back to her book.

我告诉她出了什么事，她只哼了一声就又看起书来了。

《牛津词典》

"I now realize that they took my money with a smile and made fun of me when I turned my back, " Chung's statement says.

CNN: Chung testimony: I'm not a Chinese agent

It was quiet now, no talk, no sound, only the silent continuum of snow at the window and I wanted to make her see how beautiful it was, if not always, then at least for now, but when I turned around she was asleep in her chair, her head flopped back, her arms dangling at her sides.

NEWYORKER: Something Like Happy

When all three of them were at the clinic together, I turned to head back home, but Veata came out onto the deck and grabbed my elbow with her bony, birdlike fingers.

NEWYORKER: Swimming