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."The children used the underpasses to safely walk to school across the busy highway. "孩子们使用地下通道安全地穿过繁忙的高速公路去上学。architecturebuildingareatrafficChat with AIVocabulary GamePractice Reading
