1.claim n.聲稱(assertion)；v.聲稱(to assert)；認領(to take as the rightful owner)：索取(to ask for especially as a right)

詞根記憶：本身為詞根：叫喊

例:Many of the economists claim that the government's plan has been successful.,,She persuaded Charles VII of France to claim his throne.

2.clan n.部落;氏族( group of families descended from a common ancestor)

詞根記憶：和tribe(n．部落；類)一起記

例:matrilineal dans母系氏族

3.clandestine a.秘密的,暗中從事的(secret)

聯想記憶：clan(部落)+destine(命中注定)“部落”和“命定”都有一些“秘密”色彩-秘密的，暗中從事的

例:The demand for the clandestine product would be substantially reduced.

4.clarity v.澄清(to make clear, to free of confusion)

詞根記憶：clar(清楚)+ify(使…)--澄清

例:The explanation clarrfied the details of the plan.

5.clarity n.清楚，明晰(the quality or state of being clear)

例:Many writers of modern English have acquired careless habits that damage the clarity of their prose.

6.classify v.分類(to arrange in classes);歸類(to assign to a category)

詞根記憶：class(種類)+ify(伎…)--分類

例:The pterosaurs(翼龍)should be classrhbd as birds, not reptiles.

派生詞:classification(n.分類法)：classified(a.分類的)