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The magic number 150 suggests that the size of our social networks is limited by the size of our brains.

能源領(lǐng)域的真正領(lǐng)導(dǎo)力意味著平衡當(dāng)今需求與未來責(zé)任。

我們總是在尋找答案，但有時問題本身就是答案。

"You never really understand a person until you consider things from his point of view."

"We are what we repeatedly do. Excellence, then, is not an act, but a habit."