注意力是心灵以清晰生动的形式，从几个同时可能出现的对象或思绪中占据一个。
Attention is the taking possession by the mind, in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought.
The best farmers don't just raise animals; they cultivate ecosystems.
译文：坏人未必天生就坏，往往是习惯成了本性(梁上君子典故)。
