永远不要停止学习，因为世界从未停止变化。
Never stop learning, because the world never stops changing.
The story of chemistry is the story of humanity’s quest to understand the world.
我不会说我完美，但我在尽力。
In saying that someone did something， we may be doing something ourselves.
对死亡的回避是不健康和异常的，它使生命第二阶段失去目标。