1. The wolf gnashes his teeth in anger. - 狼愤怒地咬牙切齿。
2. She gnashes her teeth in frustration at the computer screen. - 她因电脑屏幕而感到沮丧地咬牙切齿。
3. The villain gnashes his teeth as he is defeated by the hero. - 反派在被英雄打败时咬牙切齿。
4. The lion gnashes its teeth as it prepares to attack. - 狮子在准备进攻时咬牙切齿。
5. The old man gnashes his teeth in pain. - 老人因疼痛而咬牙切齿。
6. The monster gnashes its teeth as it chases after its prey. - 怪兽在追逐猎物时咬牙切齿。