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You don't build a business. You build people, and then people build the business.

The thing about happiness is that you only know you had it when it's gone.

煤炭不是問題所在，問題在于我們如何使用它。解決方案在于更清潔的技術和更好的利用。

"You have to work hard to get to the top, but you have to work even harder to stay there."