Dan YU: believe in love, to be yourself.

于丹：相信爱情学做自己。

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Just as I've decided that she's a thoroughly tough 21st-century cookie, Yu Dan turns all coquettish.

就在我已经决定认定她是一块21世纪的磐石之时，于丹又展示了她柔情的一面。

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Professor Yu Dan then wrote a $3 book based on her lectures, which sold 4 million copies, more than double the sales of the previous bestseller, "Harry Potter and the Sorcerer's Stone."

于丹教授随后把她的演讲内容结集出版为售价3美元的书，这本书的销售量为之前畅销书《哈利波特与魔法石》的两倍多，达到惊人的四百万本。

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