終端通信成本 communication terminal: 通信終端terminal communication: 終端通信terminal costs system: 定期成本核算制terminal system design costs: 終端系統(tǒng)設(shè)計(jì)費(fèi)clt communication line terminal: 通信線路終端下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯