在线词典合龙修筑堤坝或桥梁等从两端施工,最后在中间接合,叫做合龙。拼音hé lóng解释修筑堤坝或桥梁等从两端施工,最后在中间接合,叫做合龙。英文释义to join the two sections (of a linear structure: bridge, dike etc) to complete its construction