She sighed clenching her hands into fists at her sides .

她叹了口气紧握成拳头在她的两侧她的手。

I shouted , clenching my fist tightly .

我喊道，握紧我的拳头紧紧地。

A few of the men held their composure by gripping armrests and clenching teeth , but their fear was written all over them .

几个男人死死抓住座位扶手，咬紧牙关，竭力保持镇静，但是浑身上下却透出了惊惶恐惧。

Aaron shook his head clenching his eyes shut .

阿伦摇摇头紧咬他的眼睛紧闭。

If you often wake up with a dull headache or sore jaw , you may be grinding your teeth or clenching your jaw while you sleep , a problem called bruxism .

如果你经常醒来的时候有轻微的头痛或下巴肿痛，你可能是在睡觉的时候磨牙或者紧闭牙关，被称为夜间磨牙症。