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Moral malnutrition and mental poisoning do harm to people's mind, just as physical malnutrition does harm to health.
道德的营养不良和精神的中毒对人的心灵的危害,正如身体的营养不良对于身体健康的危害一样。
It really matters whether people are working on generating clean energy or improving transportation or making the Internet work better and all those things. And small groups of people can have a really huge impact.
Sustainability is not a trend; it's a responsibility we owe to the earth and future farmers.
数学家是模式的创造者,就像画家或诗人一样。