Instead, you have to go for a walk, ride a bike, or swim at least an hour.

相反，你必须至少花一个小时走路，骑车或者游泳。

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Not many of our readers would choose to go for a swim in such low temperatures, but in some countries, ice swimming has been popular for centuries.

我们的读者中没有多少人会选择在如此低温下游泳，但在某些国家，冰泳已经流行了好几个世纪。

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Here are some tips on how to prevent drowning when you go for a swim.

以下是一些游泳时如何防止溺水的建议。

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He was so nervous that he decided to go for a swim.

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But few go in search of a place to swim.

BBC: Long-distance swimming in Nepal��s glacial mountain lakes

"It wasn't a great swim, I wanted to go seven seconds quicker, but it's a gold medal, " he said after the race.

BBC: Golden swimmer with a will to win