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唯一有价值的东西是你无法买到的东西。
Sustainability isn't a trend; it's a responsibility we all share for the planet.
The silliest woman can manage a clever man; but it needs a very clever woman to manage a fool.
Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.
过去是学习的重要来源,但也是错误的重要来源。
The rules of survival never change, whether you’re in a desert or in an downtown street: you need to be hydrated, you need food, and you need shelter.