假如你让电影倒带播放，你会发现任何事情都带有明显的时间方向性质，就像有东西拉着他们：时间箭头。
If you look at a movie that's being played backwards, you know it immediately because most things have a distinct time direction attached to them: an arrow of time.
电影放映：由于是使用35毫米胶片放映，每次影片结束都必须人工倒带，需要一定的时间。
Film screening: Owing to the use of 35-mm film, it takes certain amount of time to manually rewind the film when the movie ends.
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