If you look at classrooms right adjacent to one another, they have very similar ecosystems, but if you go to an office that is a farther walking distance away, the ecosystem is fundamentally different.
如果观察彼此相邻的教室 它们拥有十分相似的生态系统 但如果观察 与其相距甚远的办公室 其中的生态系统则大不相同