grade crossing
柯林斯词典
1. N-COUNT A grade crossing is a place where a railway track crosses a road at the same level. (铁路与公路相交的) 平交道口[美国英语]
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1. N-COUNT A grade crossing is a place where a railway track crosses a road at the same level. (铁路与公路相交的) 平交道口[美国英语]