group speed的用法和樣例：
例句
- The group velocity is the speed at which modulated signals would be transmitted.
群速度就是將調製信號發送出去的速度。 - To avoid a decreasing Average Swarm Speed, some tracker administrators are banning these often throttled standard ports.
要避免越來越少的平均群速度，一些跟蹤儀管理員取締這些經常被節流的標準埠。
