compound symmetry element
复合对称元素
1.They seemed devoted to each other and were openly affectionate.x09
他们看起来非常恩爱,柔情蜜意溢于言表.
2.This collection of letters is affectionate,candid and wickedly funny.x09
这本书信集感情真挚,语言坦率,还透着一种顽皮的滑稽.
compound symmetry element是什么意思