吃透英语课本，提升在校竞争力
v. 咧嘴而笑
n. 咧嘴而笑
现在分词：grinning
第三人称单数：grins
过去式：grinned
过去分词：grinned
复数：grins
He grins, delighted at the memory.
想起往事，他咧嘴笑了。
She grinned at me, her eyes sparkling.
她咧嘴对我笑着，两眼放光。
He came into the room with a friendly grin on his face .
他走进房间，脸上带着亲切的微笑。
grin and bear it
逆来顺受
