形容词
中文翻译：无路的
同义词：
['unnavigable', 'impassable例句：1. The road was so narrow that it was impossible for a car to pass through.（那条路太窄了，以至于一辆汽车都无法通过。）']
例句：
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1. The road was so narrow that it was impossible for a car to pass through.
那条路太窄了，以至于一辆汽车都无法通过。
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2. The mountain path was too steep for us to walk up without ropes.
那条山间小径太陡了，我们没有绳子就没法上去走。
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3. The river is too deep to cross with just a small boat.
这条河太深了，只用一条小船是无法过河的。