生活大爆炸第一季第一季最开始的一段对白好像是一个笑话,可是我没听懂,

生活大爆炸第一季第一季最开始的一段对白好像是一个笑话,可是我没听懂,
heldon:So if a photon (particle of light) is directed to a plane with two slits in it and either slit is observed,
如果一个光子打向有两个狭缝的平面,如果有一个狭缝可以观测到,
it will not go through both slits.If it's unobserved,it will.
那它没有同时通过两个狭缝.如果观测不到,那它会通过.
However,if it's observed after it's left the plane but before it hits its target,
但如果它是在离开平面后在击中目标物之前被观测到,
it will not have gone through both slits.
那它不会同时通过两个狭缝.
-Leonard:Agreed.What's your point?
同意.你想说什么?
-Sheldon:There's no point.I just think it's a good idea for a T-shirt.
没什么,我只是觉得这个主意放在T恤上不错.