I never believed myself that I could be in the French Open final, I wish I can do even better in Saturday's final.

我从来没有想到自己会进入法网决赛，我希望能在星期六能表现得更好。

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Deeply moved, Mr. Wei writes: "If I hadn't seen with my own eyes what this 8-year-old boy can do, I wouldn't have believed it."

深受感动的蔚然写道：“要不是我亲眼所见这一连串的事情在这个刚八岁的小孩子身上发生，我真不能相信。”

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If you took a best response to some believe, you can say I took this action because I believed other people are going to do this.

如果你针对自己的信念做出了最佳对策,你就可以说,我是所以这么做,是因为我认为其他人会那么做

耶鲁公开课 - 博弈论课程节选

But even at two sets down I still believed I could do it, and that's about the only positive I can take.

CNN: Big scares for Djokovic and Federer at French Open

"After the World Cup and the obvious disappointment of that, I went away to think about whether I really believed I can continue to make progress with this side, and eventually I decided that yes I do, " said Hadden.

BBC: CHOOSE A SPORT