词根词缀:extra-, extro-, extr-, exter-
【来源及含义】Latin: beyond, outside, on the outside, outward, external
【同源单词】Ab extra, ad extra, ad extremum, exteriorly, external, external reforming
【来源及含义】Latin: beyond, outside, on the outside, outward, external
【同源单词】Ab extra, ad extra, ad extremum, exteriorly, external, external reforming