They showed great perseverance in the face of difficulty. 他们面对困难表现了坚强的毅力.

The only way to improve is through hard work and dogged perseverance. 要更上一层楼,唯一的途径就是艰苦奋斗,不屈不挠.

encounter:to experience something, especially something unpleasant or difficult, while you are trying to do something else 遭遇,遇到(尤指令人不快或困难的事)

We encountered a number of difficulties in the first week. 我们在第一周遇到了很多困难.

I had never encountered such resistance before. 我以前从未遇到过这么大的阻力.
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