translation.en: As you go farther down this scale here, that's a micron, or a micrometer, and we go all the way down to here to a nanometer and an angstrom. Now, an angstrom is the size of the diameter of a hydrogen atom.
translation.zh: 当我们把测量范围进一步缩小 就是一微米 接下来 到纳米 和埃 埃的大小恰好是一个氢原子的直径的长度