短文改错
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Experiments have shown that children can be taught swim |
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at a very early age.At a special swim pool in Los Angeles |
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children become good in holding their breath under |
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even before they can go walk.It is not long before they |
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are so used to swim that they can pick up weights from the |
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floor of the pool. One of their popular games are the under |
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water tricycle(三轮车)race.Tricycles are lined up above |
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water.The children all try best to reach the other end |
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of the pool.Many ride their tricycles,but most of them |
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push theirs.Some can finish the whole race with coming |
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up for breath. |