这些书反映了一种在英国特别强烈的趋势：在游泳池里游泳的人越来越少，越来越多的人选择去开放水域。
These books reflect a trend particularly strong in Britain, where swimming in pools is declining, but more and more folks are opting for open water.
这些书反映了一种趋势，在英国尤为突出：在游泳池里游泳的人越来越少，越来越多的人选择去开放水域游泳。
These books reflect a trend, particularly strong in Britain, where swimming in pools is declining, but more and more folks are opting for open water.
这些书反映了一种趋势，在英国尤为突出：在游泳池里游泳的人越来越少，越来越多的人选择去开放水域游泳。
These books reflect a trend, particularly strong in Britain, where swimming in pools is declining, but more and more folks are opting for open water.
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