名词
中文翻译：主要运输路线
同义词：
['main road', 'main route', 'principal artery']
例句：
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1.The main haulage highway runs through the heart of the city.
这条主要的运输高速公路穿过市中心。
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2. Main roads are essential for transportation.
主干道对于交通至关重要。
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3. The construction of the main haulage highway has greatly improved the efficiency of the transportation system.
主要运输公路的建设大大提高了交通系统的效率。