“group velocity”的概念、定义、翻译、参考文献-科学参考

单词	group velocity
释义	group velocity Encyclopedia 理学声波导释 group velocity群速度波包在空间的传播速度。理学﹝固体动力学﹞释 group velocity群速度波动力学中波群的包络或振幅的最大值在介质中的传播速度，定义为波的频率对波数的偏导数，也是波的能量在介质中传播的速度。 Physics 光学、声学声学 group velocity群速[度] ＞声学＞声学基础理论＞释义 group velocity群速度 group velocity群速^†，群速度 Mathematics group velocity群速度 Astronomy group velocity群速度
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