He had a big smile on his face.

他笑容满面。

《牛津词典》

The smile on her face made it all worthwhile.

她脸上的笑容使得这一切都非常值得。

《牛津词典》

He greeted all his guests with a fixed smile on his face.

他对所有的客人都以他的一贯笑容相迎。

《牛津词典》

There was a smile on his face.

VOA: special.2010.07.31

Now, the person who is the mandated smiler, on three, please smile. One, two, three. Okay.

现在，要求微笑的一方，我数到三，微笑，一，二，三。

耶鲁公开课 - 心理学导论课程节选

The one on the right is a smile of greeting.

右边是打招呼的微笑。

耶鲁公开课 - 心理学导论课程节选

Right now, he's a little shaky but he has a big smile on his face.

NPR: New Citizenship Test Gets Dry Run

The smile on her face was unbelievable, she was just a lovely little girl, my baby.

BBC: Hannah Windsor murder: Boyfriend Adam Lewis jailed

"There's no reason not to have a smile on your face at this moment, " Anthony said.

WSJ: Knicks win 1st Atlantic division title since 1994