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"The best time to plant a tree was 20 years ago. The second best time is now."
I don't give a damn if you're offended, I don't care.
Never forget what you are, for surely the world will not. Make it your strength. Then it can never be your weakness. Armor yourself in it, and it will never be used to hurt you. 
可持续发展要求我们在经济增长和环境保护之间取得平衡。
Curiosity drives science, but ethics must guide it.