He grinned at her ruefully.

他对她咧嘴一笑，表示遗憾。

She grinned amiably at us.

她咧着嘴向我们亲切地微笑。

He grinned, waved, and said, "Hi!"

他咧嘴笑笑，挥挥手，说道：“嗨！”

Martin grinned wickedly.

马丁顽皮地咧嘴笑了笑。

Charles grinned broadly.

查尔斯咧大嘴笑。