adj.（水域）可航行[通航]的，（船只、飞机等）可领航的，可操纵的
n.（河、海和船舶等的）适航性
The lower reaches of the river are navigable for steamers.
这河的下游能够行驶轮船.
The river is navigable now.
河开了.
The river is navigable by vessels of up to 90 tons.
90吨以下的船只可以从这条河通过.
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