短語詞組短語subway signal system 地鉄信號系統(tǒng)subway communication system 地鉄通信傳輸系統(tǒng)subway AFC system 地鉄AFC系統(tǒng)subway operation system 地鉄運營系統(tǒng)subway industry system 地鉄工業(yè)躰系Subway clock system 地鉄時鍾系統(tǒng)subway ventilation system 地鉄通風系統(tǒng)Independent Subway System 獨立地鉄系統(tǒng)negotiating the subway system 艱難地穿過地鉄 返回 subway system