信息收發(fā)自動化 sending-receiving: 收發(fā)的coded sending receiving system: 密碼的發(fā)收系統(tǒng)receiving while sending: 邊收邊發(fā)sending after receiving completely: 收完再發(fā)sending and receiving data: 發(fā)送和接收數(shù)據(jù)下載手機詞典可隨時隨地查詞查翻譯