名词
中文翻译：可航行的跨度
同义词：
['navigable distance', 'navigable length']
例句：
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1.The ship's navigable span is 20 nautical miles.
这艘船的可航行长度是20海里。
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2. The bridge was designed to accommodate a navigable span of 50 meters.
桥梁的设计是为了容纳一个50米长的可航行跨度。
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3.The river has a navigable span of 10 kilometers.
这条河有一个10公里长的可航行跨度。