详细解释
龇
1、使牙赤裸或无遮掩。
龇,开口见齿之貌。---《说文》
龇着牙
例句
那条狗龇着牙低声吼叫。
The dog bared its teeth in a snarl.
当他看到她是一个成年人，他向她龇着小珍珠般的牙齿，咬牙切齿的。
When he saw she was a grown-up, he gnashed the little pearls at her.
它龇起牙冲我咆哮。
He growled at me and showed his teeth.
那白人龇着牙。
The white man bared his teeth.
于是，她慢慢龇出两颗大毒牙，先展示一下丛林之王的威力。
So, she slowly and showed a two big fangs, first show how the power of the king of the jungle.
放松下巴、前额和嘴唇的肌肉来保持沉着冷静、然后龇一龇牙。
Relax the muscles in your jaw, forehead, and lips to keep cool, then eke out a grin.
蒙娜丽莎那迷人而永恒的微笑，就是从这些龇着牙的祖先身上遗传下来的。
In other words, Mona Lisa inherited her endlessly intriguing smile from the grinning common ancestor she Shared with chimpanzees.
那座岩壁，像是哈尔巴企克这怪物脸上的一颗长得歪歪斜斜的大门牙，龇着，突出去好远。
The precipitous cliff of the monstrous Harbaqik Mountain looks like a crooked front tooth bared and projected to a great length.
“请给我您承诺过的奖励吧”鹤说，狼龇着钢牙冷笑到，“你就知足吧，刚才你把头放进一只狼的嘴里，并且安然无恙的拿了出来，这对你已经是最大的奖励了。”
The Wolf grinned and showed his teeth and said: “Be content. You have put your head inside a Wolf's mouth and taken it out again in safety; that ought to be reward enough for you.”
“请给我您承诺过的奖励吧”鹤说，狼龇着钢牙冷笑到，“你就知足吧，刚才你把头放进一只狼的嘴里，并且安然无恙的拿了出来，这对你已经是最大的奖励了。”
The Wolf grinned and showed his teeth and said: “Be content. You have put your head inside a Wolf's mouth and taken it out again in safety; that ought to be reward enough for you.”