单词rictus
n.: 扭曲（或怪笑）的嘴；龇牙咧嘴
网络: 露齿裂嘴；裂口；嘴裂
扭曲（或怪笑）的嘴；龇牙咧嘴:
a wide twisted or smiling mouth that does not look natural or relaxed
【动物;动物学】嘴裂,(鸟或动物)张嘴时的阔度
(此种)裂口
露齿裂嘴,龇牙咧嘴
n.grimacegrinfixed expressioncontortion
Yes, thighs strain with effort, but I"m distracted by the twirling toes and the bleached teeth framed by rictus smiles.
是的，她们的腿用力的绷得很直。但是那些旋转的脚趾头和微笑时露出的漂白过的牙齿让我心烦意乱。
As one former banker notes: "You just hope everyone"s too drunk to notice that your voice is flat and your smile is really a rictus grin. "
正如一位前银行家所言：“你就是希望所有人都酩酊大醉，注意不到你那软弱无力的声音和硬挤出来的笑容。”
His face was set in a rictus of death that was somewhat like a smile.
他的脸摆出死亡的龇牙咧嘴，有点像在微笑。
One rictus , flesh have fallen down , Charley has left being holding flesh in the mouth.
一张口，肉就掉下来了，狐狸叼着肉走了。
Because it was clear from the rictus of agony and terror frozen on Sheldon Crane"s face that he had still been alive when. . .
照片上，凝固在谢尔顿·克莱恩脸上因煎熬、恐惧而龇牙咧嘴的表情清楚地显示，当他被……的时候还是活着的啊。