单词：group speed
group speed的用法和样例：
例句
- The group velocity is the speed at which modulated signals would be transmitted.群速度就是将调制信号发送出去的速度。
- To avoid a decreasing Average Swarm Speed, some tracker administrators are banning these often throttled standard ports.要避免越来越少的平均群速度，一些跟踪仪管理员取缔这些经常被节流的标准端口。
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