The twins set themselves the challenge of learning a language in a week in order to stretchthemselves, and then it was a question of choosing which language to learn.

这对双胞胎最初为自己定下在一周内学习一门语言的挑战是为了超越自己，接下来就是选择哪一种语言学习。

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The twins set themselves the challenge of learning a language in a week in order to stretch themselves, and then it was a question of choosing which language to learn.

这对双胞胎最初为自己定下在一周内学习一门语言的挑战是为了超越自己，接下来就是选择哪一种语言学习。

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Before learning English in order to understand the world, is now trying to learn English is to understand China.

以前学习英语是为了了解世界，如今努力学习英语是为了了解中国。

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