您要查找的是不是：
- Do you have any backup if this machine fails? 如果这台机器坏了你有备用的吗?
- We should always have a backup plan. 我们应该总是有备用的计划。
- A reflected signal on a communication channel. 一种在通信信道上反射回来的信号。
- I am in communication with him on this subject. 关于这问题，我正和他交换意见。
- The essence of language is communication. 语言的本质是沟通。
- Language is an instrument for communication. 语言是交际的手段。
- We had a discussion on language and communication. 我们就语言和交际问题进行了讨论。
- Radio communication has annihilated space. 无线电通讯已消除了空间的阻隔。
- We offer a free backup service to customer. 对顾客我们提供免费配套服务。
- In data communication, transmitted and received messages. 在数据通信过程中，被发送和接收的报文量。
- And some backup of storage devises. 还有一些储存设备的备用件。
- This area has not been covered by the communication net. 这个地区还不在通讯网的覆盖之内。
- We need to make a move for a backup pg. 我们必须对替补组织后卫的位置有所行动了。
- Communication by the exchange of letters. 通信联系通过信的交换而进行的交流
- How to Select Backup Solutions for LAN Application? 局域网应用如何选择备份方案?
- The system includes a backup auxiliary system. 此系统还有一个后备的辅助系统。
- They should have backup details available. 他们要补充自己所知道的细节。
- To make a backup of(a program or file). 备份为（程序或文件）备份
- In radio communication, either short or long waves may be used. 无线电通讯可以采用短波也可以采用长波。
- backup communication 热备通迅
