古之立言者，皆有所为而为之，非苟而已也。
古代著书立说的人，都是有所为而为之，不是随便写写的。
The beauty of mathematics lies in its ability to reveal the hidden structures of reality.
Innovation is the lifeblood of aquaculture, and sustainability is its future.
自由民主制度可能并不完美，但它是我们拥有的最好的制度。
在计算机体系结构中，唯一不变的是变化。
Each Wal-Mart store should reflect the values of its customers and support the vision they hold for their community.
Success is relative: It is what we can make of the mess we have made of things.
When a person realizes he has been deeply heard, his eyes moisten. I think in some real sense he is weeping for joy. It is as though he were saying, "Thank God, somebody heard me. Someone knows what it's like to be me."
Measuring success in aquaculture by volume alone is like judging a forest by its lumber yield.