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挑戰(zhàn)在于使不可見的東西變得可見。

At the back of my mind I had a sense of us sitting about waiting for some terrible event, and then I would remember that it had already happened.

The best time to plant a tree was 20 years ago; the second-best time is now.

沒有可持續(xù)性的效率只是短期的勝利；真正的進步是以長期影響來衡量的。