短語詞組短語navigable river 通航河流;通航河道navigable stage 通航水位navigable construction 通航搆造navigable areas 可航渡區(qū)域navigable technique 通航技術(shù)navigable wall 導航牆navigable limit 可航極限navigable waters 可航水域;通航水域navigable flow 通航水流 返回 navigable