translation.en: They could define the viewing direction from which you want to generate an image for your visual imagery, so you can imagine what happened when you were at this wedding, for example.
translation.zh: 它们可以明确 你需要在脑中形成哪个方位的图像， 就拿回忆婚礼情景来说，以上过程就能让你回想起那一切。