The capacity of the human mind for formulating and solving complex problems is very small compared with the size of the problems whose solution is required for objectively rational behavior in the real world.

在量子力学中，轨迹的概念失去了意义。

渔业管理必须适应不断变化的海洋条件。

正义并不总是黑白分明；有时它是灰色的。

The powerful have always preyed on the powerless. That's how they became powerful in the first place.