translation.en: So he sat down -- and I imagine he had nothing more than a simple piece of paper and a pencil -- and he tried to write down, and did write down, the simplest function that he could think of which had the boundary conditions that the wave function vanish when things touch and is smooth in between.
translation.zh: 他就这样坐下来 我想他除了一张纸 还有一支笔 什么都没有吧 他试着 并成功的写下 他能想到的最简单的函数 也就是有着 相碰就会归零 和除边界之外 其余完全平滑 这两条边界条件的波函数