She gave a broad grin.

她咧着大嘴笑。

《牛津词典》

Optimism begins in a broad grin, and Pessimism ends with blue spectacles.

乐观主义开始露齿一笑，悲观主义结果眼前一片暗淡。

youdao

Behind him was the kid, stepping softly like a scout, with a broad grin on his face.

小家伙像侦察兵一样悄悄地跟在后面，咧着嘴大笑。

youdao

"We found our 108th child this year, " she says with a broad grin.

BBC: World

Literally uplifting, "Promenade" shows the artist with a broad grin on his face, flying his wife in the air like a kite.

BBC: Chagall and the art of passion and drama

After she had basked awhile in that standing ovation, she broke into a broad grin and jumped up and down several times, waving her arms exuberantly.

WSJ: Damrau dazzles in debut as Violetta at Met