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- 雪打在她的脸上，但是她咬紧牙关，继续前进。
The snow was blowing in her face, but she gritted her teeth and went on.
- 遇到困难只需咬紧牙关坚持下去。
When things get difficult, you just have to grit your teeth and persevere.
- 他咬紧牙关，什么也不肯说。
He clenched his teeth and refused to tell anything.
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