1. 宣布,公之于众
1). Announce：宣布，宣告，也可以用于抽象意义的“显示”
Announce a cease fire
The invention of the microchip announced a new generation of computers.
2). Declare：指正式场合的宣布官方的立场
Declare the result of election
3). Proclaim；官方做出严肃，认真的申明
Proclaim a law
2. 下降
1). Descend：指位置从高往下降或身份的降低
Descend the steps.
2). Decline：指数量，需求或水平的下降
Some day software will translate both written and spoken language so well that the need for any common second language could decline.
3. 减少
1). Decrease：应用范围广，指数量的减少
Traffic decreases on holidays.
2). Diminish：带走或分离出去，有时指价值突然降低
An occasional outburst didn’t diminish my respect for her.
3). Abate：使过分过量的事物得到缓和
Abate taxes
4). Reduce：强调人为的减少
He is trying to reduce expenses.
4. 表示，暗示
1). Indicate：以某种方式明确的表示，显示
His hesitation indicates unwillingness.
2). Imply：暗示更为复杂，一般通过非语言方式
Silence sometime implies consent.
3). Hint：指的是通常包含线索，间接的或较隐蔽的暗示
He hinted that he would accept an invitation if it were extended.
4). Suggest：指无意识的显示或间接表明
Her expression suggested pleasure.
单词与词组
Damn：谴责，该死的 (this god damn tooth is killing me!)
Damp：潮湿的
Dash：猛冲的
Dealership：代理权
Rebate：减少，回扣
Drill：练习
Deceit：欺骗，谎言
Perceive：察觉
Decent：体面的
Tariff：关税
Panic：恐慌
Decoration：装饰品
Dedicate：奉献
Deficit：赤字
Delegate：代表
Deliberate：故意的
Demonstrate：论证，展示
Denounce：公开批评
Density：密度
Depict：描述
Designate：指明
Desolate：荒芜的
Despise：轻视
Detach：分开，分离
Detain：拘留
Dew：露水
Diagnose：诊断
Diameter：直径
Diligent：勤奋的
Dilute：冲淡，稀释
Business cycle：商业周期
Make a dash foe…：向…猛冲
Declare oneself：发表意见
Express delivery：快递
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