translation.en: And then an experiment -- a little bit about the nature of perspective, where the outside shape is determined by the peculiarity of perspective, but the shape of the bottle -- which is identical to the outside shape -- is seen frontally.
translation.zh: 然后又是一个实验—— 有一点点关于透视的性质， 它的边缘形状由透视的特性决定， 但是和边缘形状类似的瓶子的外形 看起来更靠前一些。