单词	紀念章
释义	紀念章1. souvenir badge
随便看	differences difference scale difference scaler difference scheme difference sequence difference sequent difference set difference-set block code difference set code difference-set code difference signal difference sign test differences in color differences-in-differences estimator differences of co-ordinates difference spectrum differences side-by-side difference stationary difference strategy differences vs totals plot difference synthesis difference table difference temperature difference test difference threshold