选自汉·桓宽《盐铁论·相刺》。橘柚生长于江南，各地的人吃起来都有甜的感觉，这是因为大家的味觉是相同的；郑国卫国的音乐，大家都觉得好听，那是因为大家对声音效果的感受是相同的。这句话以吃橘柚的感觉与听音乐的感受为喻，说明是非好坏的标准是客观存在的，人类社会的价值认同大体是相同的。

The only true heroism in the world is to see the world as it is and still love it.

Sustainability is not an option; it's a necessity for the future of agriculture and food production.

Machinery and labor-saving devices are only valuable as they serve to reduce the cost of manufacture.

The more you know, the more you suffer.

挑战让生活变得有趣；克服挑战让生活变得有意义。

The true wealth of a country lies not just in its land but in its waters.

Never underestimate the power of preparation—whether in negotiations, operations, or crisis management.