大家都搜：
回显请求
1、foreshortening echo───缩短回波
2、echo lee───回音李
3、sweet echo───甜美的回声
4、mic echo───麦克风回波
5、prayer request───祈祷请求
6、refund request───退款请求
7、request───n.请求；需要；vt.要求，请求
8、echo vol───回音音量
9、echo───vi.随声附和；发出回声；n.回音；效仿；vt.反射；重复
1、Packet Internet Groper a program used to test whether a particular network destination is online, by sending an Internet control message protocol echo request and waiting for a response.───包因特网查询工具用于通过发送一个Internet控制消息协议回送请求并等待应答来测试一个特定网络目的地是否联机的一种程序。
2、The ICMP echo request failed because there is no valid route between the source and destination computers .───由于在源计算机和目标计算机之间没有有效的路由，ICMP回送请求失败。
3、Value specified in the ICMP echo request controls packet fragmentation.───值控制数据包的分段。
4、The ICMP echo request failed because contact with the destination computer is administratively prohibited.───由于管理员禁止联系目标计算机，ICMP回送请求失败。
5、The identifier and sequence fields are used to match the echo replies to the corresponding echo request.───识别子和序号栏位使用来匹配回应回覆给对应的回应请求。
6、ICMP echo request failed because the source address and destination address that are specified in an ICMP echo message are not in the same scope.───由于ICM P回送消息中指定的源DiZhi和目标DiZhi不在同一范围内，ICM P回送请求失败。
7、The Ping class does not throw this exception if the ICMP Echo request fails because of network, ICMP, or destination errors.───如果ICMP回送请求因为网络、ICMP或目标错误而失败，则Ping类不引发此异常。
8、In the simplest form, you can send an echo request to a host and find out the response time (see Listing 1).───按照最简单的形式，可以向一个主机发送echo请求并查明响应时间(见清单1)。
1、Packet Internet Groper A program used to test whether a particular network destination is online , by sending an Internet control message protocol echo request and waiting for a response .