Group velocity
[计] 群速\\n[化] 群速
🧩 词语组成解析
group
[ɡrup]
n. 组，团体;群，批;（雕塑等的）群像;（英美的）空军大队;
vt.& vi. 使成群，集合;
vt. 分类，归类;
🗣️ 情景例句
You'll sleep sounder for it.
你会因此而睡得更加酣畅。
He that spares the bad injures the good.
饶恕坏人便是伤害好人。
Don't thank me, said Miss Yang. We must both thank Lucy!
“不用谢我，”杨小姐说，“我俩都得谢谢露茜！”