He had a big smile on his face.

他笑容满面。

《牛津词典》

His girlfriend was a real uber-babe, with long blonde hair and a big smile.

他的女友是个超级靓妞，一头长长的金发，脸上带着灿烂的笑容。

《牛津词典》

Robert nodded with a big smile.

罗伯特笑着点了点头。

youdao

Looks like the Newton boy'sgot a big smile for you. Yeah, he's a good buddy.

VOA: standard.other

Then when they stand up and face the crowds, there's a big smile.

但当他们面对人群站立时，他们露出了大大的微笑。

耶鲁公开课 - 心理学导论课程节选

But it was a big, fake smile, the Pan Am smile, a smile to communicate "hello" and but it's as opposed to a smile where the communication is that of genuine happiness.

但那是大大的，虚假的微笑，泛美式微笑，微笑意味着你好,但与微笑截然相反,交流时微笑是真正开心的。

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

Williams ran to his bench with a big smile after Dallas called timeout trailing 97-88.

WSJ: Lopez, Williams lead Nets past Mavericks 113-96

He went out fishing and he came back with a big smile on his face.

BBC: Bookmaker gunman: Alan Levers' family say 'no revenge'