在量子力学中，轨迹的概念失去了意义。

形式化方法的美在于它们能够提供关于系统行为的绝对保证。

"Every detail in an illustration should serve the story."

The true value of farming lies not just in the harvest, but in the legacy we leave for future generations.

What matters in life is not what happens to you but what you remember and how you remember it.

In the darkness, even a small light can guide you home.

今天投资于负责任林业的每一美元，明天都会成长为一百美元的环境和经济价值。