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- 问题详情：DoyouknowthatovertenmillionAmericankidsgotocampeverysummer? 16 Backthen,beforetheairconditionerwasinvented,hotcitysummerswereuncomfortableandevenunhealthyforchildren,soescapingtothecountryforafewweeksbecameapopulartrend.Today,kidshavedi...
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