translation.en: Unbeknownst to me at the time, because we had only seen the outside, the surfaces were continuing to fold themselves, to grow on the inside of the column, which was quite a surprising discovery.
translation.zh: 我当时感到很新颖 因为以前都是从外面去看 那些面还在不停地对折 而且是在柱子的内部对折 这个发现是个惊喜