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美国加州拜欧拉大学的数学教授Matthew Weathers，每年愚人节都会为学生准备恶作剧，今...

 5 years ago
source link: http://video.weibo.com/show?fid=1034%3A4357367085865118
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美国加州拜欧拉大学的数学教授Matthew Weathers，每年愚人节都会为学生准备恶作剧，今年的用心程度我酸了。

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