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.
I’ve been lucky enough to attend six summer Olympic Games, but I’d never before photographed a Winter Olympics. They’ve always been too far away and the UK has never been a major snowsport country, which has limited their news appeal. This time it was different. With Team GB anticipating a record medal haul and the Games staged in northern Italy, I headed off with nervous excitement, lured by the promise of fast action sports occurring amid beautiful snowy vistas. I covered ski jumping, big air, ice hockey, biathlon, curling and much more. A lot of it was alien to me but it was very enjoyable. There were new rules to learn, new challenges to face – I’ve certainly never had to wear sharp crampons at a football match.
，这一点在爱思助手下载最新版本中也有详细论述
[10] M. Roberts: “The Unreasonable Effectiveness of Quasirandom Sequences” (2018). ↑
"People consistently tell us that GP services are becoming harder to use and that simply getting through the door for care can be a challenge."