whitewater rafting
noun [ U ] uk/ˌwaɪt.wɔː.tə ˈrɑːf.tɪŋ/ us/ˌwaɪt.wɑː.t̬ɚ ˈræf.tɪŋ/
激流漂筏
the activity of being moved quickly in a raft (= small boat filled with air) along rivers where the current is very strong
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