The story starts with quantum field theory, which is incredibly complex, but the simplified version is that even empty space is filled with fields that could govern the interactions of any quantum objects in or near that space. You can think of different particles as energetic excitements of these fields—so a photon is simply an energetic state of the quantum field.
if char == 3: # CTRL-C
，详情可参考体育直播
据界面新闻报道，杭州西田城时代联合影城近日因推出「观影体验保障服务」引发关注，「电影难看，20 分钟内可退款 40%」的话题登上热搜。
Fighting in the Middle East has begun disrupting energy exports from the region, and oil markets are responding. The U.S. benchmark, West Texas Intermediate crude, climbed about 6% on Monday to just over $71 a barrel.