noun 下载 🔗分享 地下通道,人行地道. A passage that crosses a road, railroad or similar obstacle in a tunnel underneath it. Examples : "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。 architecture building area traffic 与AI对话词汇游戏阅读练习