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Personality changes more during your 20s than at any other time in life.
Mathematics is the key and door to the sciences.
【译文】爱好学习的人如同禾苗稻谷一样都是有用的,不爱学习的人则像蒿草一样没有什么用处,只配当柴火来烧。
"The best way to find out if you can trust somebody is to trust them."