31 reduction n.减小,减少,缩小
32 redundant a.多余的,过剩的(食物)丰富的被解雇的
33 reed n.芦苇,苇丛芦笛,牧笛
34 reel n.卷筒,线轴 v.卷,绕
35 refer v.参考,查询提到,引用,涉及提交,上呈
36 reference n.提及,涉及参考,参考书目证明书(人)
37 refine v.精炼,精制,提纯使文雅,使高尚
38 reflect v.反射,反映,表现,反省,沉思
39 reflection n.(reflexion)映像,倒影反省,沉思
40 reform v./n.改革,改造,改良