At the same time, his close friend, Engels, often wrote to praise him for his hard work in learning English.

与此同时，他的密友恩格斯经常写信表扬他努力学习英语。

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His hard work and perseverance in sports worth learning.

他对运动的勤奋和毅力值得我们去学习。

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His hard work and perseverance in sports worth learning.

他对运动的勤奋和毅力值得我们去学习。

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