noun🔗Share地下通道，人行地道。 A passage that crosses a road, railroad or similar obstacle in a tunnel underneath it."To get to school quickly, we used the underpass to cross the busy highway. "为了更快地到学校，我们走了地下通道，穿过了繁忙的高速公路。architecturestructurewaybuildingtrafficChat with AIVocabulary GamePractice Reading
