1.customs n.关税(duties, tolls, or imposts imposed by the sovereign law of a country on imports or exports)；海关(the agency, establishment, or procedure for collecting such customs)

例:customs agent报关代理人

2.cutback n.减少，削减(reduction)

词根记忆：来自词组cut back(减少，削减)

例:Soaring rates of liability insurance have risen to force cutbacks in the operations of everything.

3.cyclic a．循环的(of, relating to, or being a cycle)

例:cyclic system循环系统

4.cylinder n.圆柱体(solid or hollow cuNed body with circular ends and straight sides)

例:Two oil cans are right circular qdinders.

5.cylindrical a．圆柱体的；圆筒形的(relating to or having the form or properties of a cylinder)

词根记忆：来自cylinder(n.圆柱体，圆筒)

例:A right cylindrical container with a radius of 2 meters and a height of l meter is filled to capacity with oil.

6.cynical a．愤世嫉俗的(distrustful)

词根记忆：来自古希腊哲学流派“cynicism(犬儒主义)”；cyn原意为“犬”

例:The tone of the passage is persuasive and cynical.

派生词：cynicism(n.愤世嫉俗，犬儒主义)

7.dealership n.代理商，经销商(an authorized sales agency)

分拆记忆：dealer(经销商)+ship--经销商

例:an automobile dealership汽车经销商

8.debase v.降低（to lower in status, esteem, quality or character）；降低（硬币）的成色(to reduce the intrinsic value by increasing the base-metal content)

词根记忆：de+base(低)--低下去--降低

例:The coinage had been sharply debasexi

派生词：debasement(n.成色降低)

同根词：basement(n.地下室)：basis(n.基础)

9.debate n./v.辩论，讨论( discuss)

词根记忆：de(加强)+bate(打，击)--互相打击--辩论

例:The debate was about the social values.

同根词：rebate(n.回扣)：abate(v.减轻)

10.debilitate v.使衰弱( to make weak or feeble, weaken)

例:Secretions of these millipedes have been shown to contain two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate the capuchins.

派生词：debilitation(n.衰弱;乏力)