If you stand on the apron of the Wal-Mart over here and try to look at the Target store over here, you can't see it because of the curvature of the Earth.  That's nature's way of telling you that you're doing a poor job of defining space.
如果你站在这边沃尔玛的停车场上 试着看那边儿的Target商店 由于地球的曲率，你根本看不着 那是大自然告诉你“你干得很烂”的方式