旅客讲的故事往往是极其夸张的。

Travellers' tales are often highly colored.

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而沃尔玛表示这一数字“极其夸张”。

The company says that figure is "grossly exaggerated."

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的确，有很多关于大数据夸张的宣传，但是，不幸的是，大数据恰恰未来社会极其重要的工具。

It is true that there is a lot of hype around the term, and that is very unfortunate, because big data is an extremely important tool by which society is going to advance.

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