N-VAR (中间有隔离带的)双向车道,双车道公路 A
dual carriageway is a road which has two lanes of traffic travelling in each direction with a strip of grass or concrete down the middle to separate the two lots of traffic.
(中间有隔离带的)双向车道,双车道公路 [British] in AM, use 美国英语用 divided highway
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