给定系统中的酸和碱不是绝对的，而是相互关联的。
The writer’s joy is the thought that can become emotion, and the emotion that can wholly become a thought.
In every book, there is a piece of the author's soul.
牛大叫，但马却不回应；不是因为马没听到声音，是因为它们不是同类啊。点评：同类之间存在着客观联系，故能相应。
The real reward in science is contributing to something greater than yourself.