名词
中文翻译：覆盖的运河同义词
同义词：
['covered aqueduct', 'covered channel']
例句：
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1. The covered canal was once the main transportation route for goods in this region.
这条覆盖的运河曾是该地区的主要货物运输路线。
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2. The construction of the covered canal has greatly improved the efficiency of water transportation.
建造这条覆盖的运河大大提高了水运的效率。
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3. Due to its unique design, the covered canal is considered an engineering marvel.
由于其独特的设计，这条覆盖的运河被认为是一项工程奇迹。