Is a way of measuring time, it is to observe the direction of small random numbers moving in the direction of large random numbers. Does this sound like crap? really. Because according to our human intuition, "time" is like a river, moving in a fixed direction and never returning; when we discuss the classical physics of Newtonian mechanics, we do not particularly consider "time" to calculate, because no matter how it is calculated, "Time" exists forever without changing the direction of forward or backward. But when Einstein began to introduce the concept of "time" into operations, he formed that "time" is also a concept of dimension or time axis, which is a relative rather than an absolute concept.
This is a bit difficult to understand, but we telemarketing list can try to imagine it: like two people walking side by side, one forward and the other backward; according to the observation of others, one of the two people is forward and the other is backward; but only the two of them As far as humans are concerned, they are in a state of mutual stillness and moving. This is why this movie constantly interlaces in the plot in the state where the "forwards" and "retrogrades" observe each other; in particular, it takes a lot of space to present the subjective perspective of the "retrogrades". See what the normal (direct) world looks like. img_(3) Photo Credit: XXY The highway scene in the movie; different relative state observation, there will be different relative state cognition.
Let's take the highway bridge section in the film as an example: the protagonist initially drives in the forward direction of time, and sees a "silver car" (1) first rolled over (2) witnessed the rollover process (3) the car in the driving state (4) clipped A silver vehicle appeared between Sato and the protagonist himself (5); but when the protagonist entered the reversal machine and started to drive the "silver car", he realized that he was the driver of the "silver car", and he was in the reverse state of time. The process is the order of (5)(4)(3)(2)(1). It should be noted that the protagonist observes that the silver cars (3) and (5) are in the reverse state when the time is forward, but when he enters the time reverse state, (3) and (5) are driving in the normal direction.