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阅读理解
People go in for various kinds of physical training, and winter swimming is one of them．The special thing about winter swimming is that we can have cold wind bath, icy water bath and sunbath at the same time in the open air of winter．
When we have undressed ourselves and are exposed to the cold air below zero and attacked by wind and snow, every cell, every blood vessel and nerve of our body are stirred up by the challenge, arousing in us a strong desire to go into the water．
We dive into the cold water with enthusiasm and swim with vigor．We come out just when our hands and feet are beginning to feel numb(麻木)．The massage and strong stimulus of the cold water make us concentrate on one thing－how to fight against the cold．At this moment our brain is relaxed and at rest．Every organ of our body goes through a test under special conditions, thus strengthening our metabolic(代谢)functions．We will be less susceptible to illness, and will also have curative effects on certain disease．
After we get dried, our pink coloured skins are bathed in the winter sunrays which caress(抚摸)our slightly shivering body．The anion(阴离子)air improves our lungs and dissolves in our blood．Gradually we no longer feel the cold and spring seems to be near．After the three baths of air, water and sun, we feel extraordinary warm, relaxed and comfortable．Winter swimming is both beneficial and enjoyable．That is why more and more people have come to love and accept what was once regarded as something contrary to physiological nature．The sport is enjoying a popularity never known before．
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