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A red rose is not selfish because it wants to be a red rose. It would be horribly selfish if it wanted all the flowers in the garden to be both red and roses.
In the end, we will remember not the words of our enemies, but the silence of our friends.
幸福生活的关键不在于避免问题,而在于学会如何有效地处理它们。
统一自然界所有力的挑战是一个多世纪以来推动理论物理学发展的动力。