1.decorous a．符合礼节的(correct)

例:A reserved and decorous style had been a more highly valued literary ideal.

2.dedicated a．专注的(given over to a particular purpose)；献身的(devoted)

词根记忆：来自dedicate(v.献身，致力)

例:Except for the most idealistic and dedicated, there were no incentives to seek change.

3.deduce v.推断，演绎(to infer)

词根记忆：de(往下)+duce(引导)--往下引导--推断，演绎

例:Relative land ice volume for a given period can be deduced from the ratio of two oxygen isotopes.

4.deduct v.扣除(to subtract)；演绎(to infer)

词根记忆：de+duct(弓I导)--往下引导--演绎

例:The waitress deducted the cost of the cold coffee from our bill.// deductive reasoning演绎推理

派生词：圆deduction(n.扣除;演绎)：deductive(a.演绎的)

5.deduction n.扣除，减除(an act of taking away)；推论(the deriving of a conclusion by reasoning)

词根记忆：来自deduct(v.扣除；推断，演绎)

例:As a result, these companies have shifted health care costs to employees in the form of wage deductions or high deductibles.

同根词：conduct(v.引导;管理)；induct(v.引导；传授)

6.deem v.认为(to consider)；相信(to believe)

联想记忆：别以为事情表面似乎(seem)是这样，就认为(deem)八九不离十了

例:Native Americans recogni.zed that events that they thought significant were often deemed unimportant by their interviewers.

7.default v.违约（to fail to fulfilla contract, agreement, or duty）；拖欠(to fail to meet a financial obligation)

联想记忆：de+fault(错误)--错下去--拖欠

例:Bank failures are caused when big borrowers defarAt on loan repayments.

8.defendant n.被告(a person required to make answer in a legal action or suit)；a．为自己辩护的(being on the defensive)

词根记忆：defend(保护)+ant--保护自己--被告

注意：plaintiff(n.原告)

例:a criminal defendant被告犯罪嫌疑人

9.deferential a．恭顺的（respectful, humble）

词根记忆：defer(遵从，听从)--deference(遵从；尊敬)--deferential；注意这儿的defer不是“拖延”的意思

例:Bill is always deferential to his parents.

10.defiant a.蔑视的( bold)

词根记忆：来自defy(发.藐视)

例:The hardliners are angrily defiant of the government's refusal and threaten to take action.