不及物动词露齿而笑
及物动词露齿笑着表示
名词咧嘴笑,露齿而笑
及物动词
1. She grinned foolishly at him. 她咧着嘴对他傻笑。
名词
1. He had a broad grin on his face. 他满脸笑容。