Approaching the speed of light doesn't slow down time. Approaching them does.

在接近光速的情况下时间不会减慢, 和他们在一起时才会变慢。

You see, as you get faster and faster as you approach the speed of light, you have more energy.

你看，当你越来越快，接近光速时，你有更多的能量。

You see, as you get faster and faster, as you approach the speed of light, you have more energy and in relativity energy takes more work to accelerate.

你想，当你变得越来越快，你接近光速，你会拥有更多的能量，并且在相对论中，能量需要更多的功来加速。

This, however, only becomes noticeable in extreme instances, like near black holes or approaching the speed of light, wherein both cases, time slows down.

然而， 这种情况只有在极端情况下才会变得明显，例如靠近黑洞或接近光速，在这两种情况下， 时间都会变慢。

The answer is this: Take the flashlight and put it somewhere on the Earth, in orbit or on the Moon, and then shine it on a reflector, which propels the reflector to speeds which can approach the speed of light.

答案是这样的： 把手电筒放在地球上、轨道上或月球上的某个地方， 然后照在反射器上，反射器推动反射器达到接近光速的速度。