sea海highseas,opensea远海ocean大洋inlet小湾bay海湾,湾gulf海湾cove湾cape海角promontory,headland海角,岬cliff悬崖峭壁port,harbour港(美作:harbor)bay,roadstead碇泊处sandbank沙滩beach,shore海滩strait海峡isthmus地峡reef礁石key暗礁sandbar沙洲tide潮wave浪undertow回头浪tempest风暴groundswell涌浪seaquake海震,海啸lowwater最低水位territorialwaters领海,领水icefloe冰川iceberg冰山shore海岸bank河岸estuary湖港区delta三角洲mouth,ria河口flord峡湾current,watercourse水流stream,brook小溪torrent湍流山溪rapids急流source源头spring泉bed河床flood洪水flow泛滥swelling,freshet河水猛涨,涨水basin流域tributary支流confluent汇合点meander河曲canal运河wadi,wady干谷waterfall,falls,cascade瀑布cataract大瀑布