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n (Brit) major road, less important than a motorway but usu wider and straighter than a B-road A级公路（重要性次於高速公路的主干公路, 但通常比B级公路宽且直）: There's a good A-road going North -- the A1. 有一条良好的A级公路通往北方--A级1号公路.



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