结节低回声是什么意思
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The modern Olympic Games are the world’s foremost multi-sports event.
They are the largest sporting celebration in terms of the number of sports on the programme, the number of athletes present and the number of people from different nations gathered together at the same time, in the same place, in the spirit of friendly competition.
Organised every four years, they include a summer and a winter edition. Athletes from all 206 National Olympic Committees and the IOC Olympic Refugee Team are eligible to compete in a wide range of sporting disciplines and events, watched by a worldwide audience.
The first edition of the modern Olympic Games was staged in Athens, Greece, in 1896, while the first winter edition was held in Chamonix, France, in 1924. Since 1994, the Olympic Games have alternated between a summer and winter edition every two years within the four-year period of each Olympiad.
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It is often said that it is the volunteers who “make the Games”. Early on, the organising committees of the Olympic Games launch programmes allowing tens of thousands of people from all backgrounds to ensure the smooth running of the Games.