How 3-D Movies Work

摘要

＜正＞难度:★★★★☆词数:450 建议阅读时间:8分钟 Most people see out of two eyes. This is a basic fact of humanity,but it’s what makes possible the illusion of depth（纵深幻觉） that 3-D movies create. Human eyes are spaced about two inches apart, meaning that each eye gives the brain a slightly different perspective（透视感）on the same object. The brain then uses this variance to quickly determine an object’s distance.