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　　We live in a world where we are being constantly watched and monitored. What would it take to wipe

　　这部名为《北极熊：冰上侦探(Polar Bear: Spy On The Ice)》的纪录片将于29日在英国BBC1电视台播放。　　北京时间12月28日消息，野生动物纪录片拍摄人员往往需要绞尽脑汁