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The secondary rules are those that provide for the creation, alteration, and extinction of primary rules.

你越具體，就越普遍。

I don't think about medals. I think about my performance.

我們是美國，無人能及，我們擁有終點線。

Collaboration across industries is key to solving the world's energy challenges.

最偉大的攝影師是那些學會如實地看世界，然后再看它可能成為什么樣的人。

互相有愛意，交往中也相互得利。這是墨子很典型的思想主張，也是墨家學派對人類社會最美好的期望。