She was relieved to see his face light up with a boyish grin.

看到他脸上显出孩子气的笑容，她松了一口气。

《柯林斯英汉双解大词典》

"I was just passing by and thought I'd stop in," I said, working up a grin, though I didn't feel much in the mood for levity and had begun to wish I'd stayed home and let my neighbor suffer in peace.

“我刚刚路过这里，想顺便来看看你”，我还是咧嘴笑了笑说。，尽管我的心情不是那么轻松，而且也开始希望自己待在家里就好了，好让我的这位邻居免受打扰。

youdao

Then he sat down in the middle of them and looked up at me with a sweet, sappy grin on his face.

然后，它坐在它们当中，面带甜蜜的傻笑瞧着我。

youdao

"These are problems without a solution, " he says with a grin, soaking up the sunshine in his blue serge suit.

FORBES: Magazine Article

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

And you still can make sense if you show up And present and honest face instead of that grin.

NPR: 'BPP' Jukebox: Peter, Bjorn and John Soloist