Symmetric group
[計] 對稱群\\n[化] 置換群
?? 詞語組成解析
symmetric
[si'metrik]
adj. 相稱性的，均衡的;
group
[ɡrup]
n. 組，團體;群，批;（雕塑等的）群像;（英美的）空軍大隊;
vt.& vi. 使成群，集合;
vt. 分類，歸類;
??? 情景例句
I think I'm falling asleep.
我想我要睡著了。
We were pleased to hear from your letter of 6 August that you were impressed with our selection of toys.
我們很高興收到你方8月6日來函得知你方對我們的玩具非常感興趣。
It was stolen twenty years ago when Dan was a boy of fifteen!
這是20年前丹還是一個15歲的孩子時被人偷走的！