郭说：“我一生中见识过一些干旱天气。”

Guo said, "In my lifetime, I have seen some arid weather."

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为了测试材料的自洁性能，郭教授和他的团队将吸尘器里取出的普通灰尘洒在加工过的材料表面上。

To test this self-cleaning property, Guo and his team took ordinary dust from a vacuum cleaner and dumped it onto the treated surface.

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“我的主要目标是把故事说好，让每个人喜欢它。”郭最近在一个电话访谈里说过。

"My main goal is to tell the story well and have everyone like it," Guo said recently in a telephone interview.

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