that this drug is
elective.这药已证实是有效的。2 [VN] to show by your actions that you have a
particular quality, feeling or opinion 表达;表露；表现；显露 PnTl display ： You need to demonstrate more seZ/-contro〖.你应该表现出更强的自制力,。◊ We want to demonstrate our commitment to human rights.
^ -fH 表明我们对人权的信念。3 ~ sth (to sb) jo show jnd explain how sth works or how to do sth 示■范；演示： [VN] Her job involves demonstrating new educational so/hvare.她的工作包括演示新的教学软件。[also Vwh-] 4 [V]〜（against sth) I ~ in
favour/support of sth) to take part in a public meeting or march, usually as a
protest or to show support for sth 集会示威；游行示威 EH5I protest ： .students
demonstrating against the war 举行 反战示威游行的学生◊_ They are
demonstrating in/avour 0/户'eehighereciucaricm.他们举行示威游行，要求实行免
费高等教育。|
de-mon-stra-tion
/.deman'streij'n/
noun 1 (also informal demo especially in 6rf) [C]
~ (against sb/sth) a public meeting or march at which people show that they are
protesting against or supporting sb/sth 集会示 威；游行示威：to tafce part <rn a
demonstration 参加 / 进行示威游行◊ to a demonstration 举
〇 mass demonstrations
in support of the exited ieader支持流亡领导人的群多集会$ cmti- govemme/if
demonstratforw 反政府示威游■行◊ a peace_/iil/vfotent_ttemonstratiori
和平/ 暴力示威一 compare march
2 (also informal demo) [c, U] an act of showing or
explaining how sth works or is done 示范； 示范表演；演示 i
We were given a brief demonstration of the
computer’s Unctions.有人向我们简短演示了这种计資
机的各柄功能。〇a practical demonstmriori实际操作表
^ 〇 We provide
demonstration of videoconferencing over the Internet.我们通过互联网演示视频会议。3 [C，U] an act of giving proof or evidence for
sth 证明；证实；论 证；说明：a demonstration 〇/ the
connection between the two sets 〇/ figures论证这两组数字间的联系◊ a demonstration
of how something that seems simple can turn out to be very complicated说明看似简单的东西实际
上可能非常复杂 4 [C]
an act of showing a feeling or an opinion 表达；表露；表现；显露：a pubZic demonstra-
rion o/aj^ecriori 公开表备—慕之情 oa demonstraticm 〇/ support/or the re/orms 疾示妨改;i；的支持 de-mon-stra-tive /di'mDnstrativ; NAmE
-'main-/ adj., noun
madj. 1 showing feelings
openly, especially feelings of affection公开表露感情（尤指爱慕之情）的；感情外露
的：Some peopZe are more demonstrative than
others.有 些人更容易流露感情。〇a demonstrative greeting热# 的问候 2 (gramma/•语法）used to identify the person or thing that
is being referred to 指示的：‘‘TTiis’ and ‘that’
are demonstrative pronouns. * this 和 that
是指示代词。
■
noun {grammar a
demonstrative pronoun or deter- miner指示代询；限定词
dem-on-stra-tor
/'demanstreita^)/
noun 1 a person who takes
part in a public meeting or march in order to protest against sb/sth or to show
support for sb/sth {集会或游行的）示威者2 a person whose job is
to show or explain how sth works or is done 示范者；演 示者
de-mor-al-ize (BrE also
-ise) /di'mDralaiz; NAmE -'mo:r-; -'ma:r-/ verb [VN] [usually
passive] to
make sb lose confi- denceorhopefi泄气；使意志消沉；使士气低落EBd dishearten ： Constant criticism is
enough to demor- aiize anybody.频繁的批评足以使任何人意志消沉。
► de-moral-ized, -ised adj. ： The workers here seem very demoralized•这M的工人显學十分沮丧。..de.mor.a丨.iz.ing, -is-ing adj. ： the demoralizing effects of unemployment 失业造成的使人沮丧的后果de.mor.al.iza.tion，-isa.tion /di.mDralai'zeiJ'n; NAmE -.moirala'z-; -.mairala'z-/ noun [U] de-mote /.dii'maut; NAmE -'moot/ verb [VN] [often passive] 〜sb (from sth) (to sth) to move sb to a lower position or rank, often as a punishment 使降级，使降职，使降
低地位（常作为惩罚）pnra PROMOTE ► de mo tion /.dir'mauXn; NAmE -'mou-/ noun [C, U] dem*ot-ic /di'mDtik; NAmE adj. (formal) used by
or typical of ordinary
people民众的；通俗的；大众化的
de-mo-tiv*ate
/.dir'mautiveit;
NAmE -'mou-/ verb [VN] to make sb feel that it is not worth
making an effort 使失 去动力； '使变得消极：failure can demotivate
students. 失&会挫伤学生的积极性。>€^010七13^叩0办€|6- mo-tiv-ated adj. de-mo-tiv-ation /.diimauti'veijn; NAmE -mou-/ noun [U] demur /di'm3：(r)/ verb,
noun
m verb (-rr-) (formal) to say that you do not
agree with sth or that you refuse to do sth表示反对；运出异议； '拒 .绝：[V] At
first she demurred, but then finally agreed. M 开始表示反对，但最终还是同意了。[also
V speech]
■ noun IT»!iBl without
de’mur (/b/wfl/)
without objecting or hesitating 毫无异议；毫不犹 771吖 accepted without
demur.他们接受了，没有提出异议。
de-mure /di'mju0(r); NAmE di'mjur/ adj. 1 (of
a woman or a girl 女子）behaving in a way that
does not attract attention to herself or her body; quiet and serious 拥静 的；端庄的 PWn
modest： a demure youn^ 〖ady 娴静 的年轻女’士 2
suggesting that a woman or girl is demure (举止、衣服等）显得庄重的H771 modest a demure smfie 矜持的微笑◊ a demure mny
WoiAse with a white coHar严肃庄重^白领海荤军服上表► de.mure.ly
adv.
de-mys-tify /.dir'mistifai/
verb (de-mys-ti fies, de-mys-ti- fy-ing, de-mys-ti fied, de-mys-ti-fied) [VN] to make sth
easier to understand and less complicated by explaining it in a clear and
simple way 使明白 易懂； 深 入浅出地解释► de-mys.ti.fi.ca.tion
/,di:,mistifi'keijn/
noun [U]
den
/den/
noun 1 the hidden home of
some types of wild animal 兽穴.；兽，'：a bear’s/Zfon’s den 熊的 /
狮 子的洞穴 2
(d/sfl/?/?row>7g) a place where people meet in
secret, especially for some iilegal or immorai activity 窝 点，窝子（尤指为非法或邪恶活动秘密聚会处）：a den 〇/ thfeves
贼窝◊ a
tirinfcfng/gambHng den 酬酒窝点； 备窟◊ He thought
o/iVew Ybrfc as a tien o/infqufiy•他 把纽约视为罪恶的滷薮。3 (AMm£)
a room in a house where people go to relax, watch television，etc.休息室 4 [old-fashioned, BrE, informal) a room in a house
where a person can work or study without being disturbed 书 斋；书房：Jffe would q/iten
retire to his den.他往往是0 自己如书房去。5a secret place, often made roughly with walls and a roof, where
children play (.儿童的t) 隐蔽玩耍处：They made themseives a
den in the woods. 他们在树林里为自己搭了个窝，在里面玩。IMsee
BEARD V., LION
de-nation-al-ize (BrE also -ise) /.dii'naejnalaiz/ verb [VN] to sell a company or an industry so
that it is no longer owned by the government.使私^化；使非国有化.H1!?!
privatize Pm nationalize ► de nation al
iza tion, -isa-tion /.dii.naeJnalai'zeiXn; NAmE -la'z-/ noun [U], den-drite /'dendrait/ (also den-dron /'dendron; NAmE -drain/) noun {biology ^k) a short branch at the end of a nerve
cell, which receives signals from other cells 树突 (位于神经元末端的细分支，接收其他神经元传来的信
号）一compare axon ► den-drit-ic
/.den'dritik/
adj.： dendritic ce〖k树突细胞
den-drol-ogy
/den'drDlad3i; NAmE -dra:l-/ noun [U] the scientific study of trees 树木学► den.drolo.gist
/den'drDl0d3ist; NAmE -'drail-/ noun dengue
/'deggi/
(also dengue
fever, breakbone fever) noun [U] a disease caused
by a virus carried by mosquitoes,
that is found in tropical areas and causes fever and severe pain in the joints 登革热（由蚊子传播
的热:带疾病，症状为发烧和关节剧痛）
de-nia诵 /di'naial/
nown 1 [C]!~
(of sth/that …）a state- ment that
says sth is not true or does not exist 否■认； ■否定：the prisoner^ repeated denials of the
charges ^gainst
Mm白犯再三否对他的指控◊ TTie
terrorists issued a deniaZ o/responsfbrtfty/or the attack.恐怖主义 者发表声明，否认对这次袭击负责。◊anc^icfaideriiaZ
that there would be an election before the end of the year 对年底前将进行选举的正式否认2 [C，U] (a)〜of sth a refusal to allow sb
to have sth they have a right to expect拒绝给予，剥夺（应有的权利）：the deniaZ 〇/ basic
human rights 剥夺基本人权 3 [U] (/?syc/7〇/ogy 心）a refusal to accept
that sth unpleasant or painful is true