debate v. 争论，辩论
They had fierce debate as to whether their company should restore the trade relationship which was broken year ago.
decade n. 十年，十
The South Florida nesting population has declined by 50% in the last decade, according to a marine biologist.
根据一位海洋生物学家的研究，弗罗里达南部穴居种群的数量近十年减少了50%。
deceptive adj. 欺骗性的
As an example of whats going on, consider U.S. Bancorp, which was recently sued for deceptive practices by the state of Minnesota.
decline vi. 下降，下垂
Last year, the crime rate in Chicago has sharply declined.
deduce v.演绎,推理
deem v.想, 认为, 视为; 相信
Anyone not paying the registration fee by the end of this month will be deemed to have withdrawn from the program.
本月底没有交纳注册费的人将被视为退出本计划。
defeat n. 击败，战胜，失败
The results showed that attractive males utterly defeated unattractive men, but the women who had been ranked most attractive invariably received the fewest votes.
defect n.过失，缺点
Having evolved when the pace of life was slower, the human brain has an inherent defect that prevents it from absorbing several streams of information simultaneously and acting on them quickly.
deficiency n. 缺乏， 不足
definition n. 定义，解说，精确度，清晰度
The service industry, by definition, exists to cater to others needs.
defy 1.vt 不服从，藐视，挑衅，违抗
You shouldnt defy your fathers instructions. Anyway he is an experienced teacher.
delegate n.代表
While US executives give both responsibility and authority to their employees, Japanese executives delegate only authoritythe responsibility is still theirs.
delicate adj. 精巧的，精致的，脆弱的，微妙的，棘手的，灵敏的
One of his eyes was injured in an accident, but after a delicate operation, he quickly recovered his sight.
demonstrate vt. 示范，证明，论证
Among other things, the findings demonstrate that dramatic climate change is nothing new for planet Earth.
deportation n. 移送，充军，放逐
depression n. 沮丧，消沉，低气压，低压
Depression is often caused by the cumulative effects of stress and overwork.
deprive vt. 剥夺，使丧失
In his last years, Henry suffered from a disease that slowly deprived him of much of his sight.
在晚年，亨利受到一种疾病的折磨，这种病慢慢的损伤了他的大部分视力。
desert n. 沙漠 应得的惩罚vt. 抛弃
Many people think of deserts as barren regions, but numerous species of plants and animals have adapted to life there.
desirable adj. 值得要的，合意的，悦人心意的
Conflict, nevertheless, is very likely to occur, and is probably an essential and desirable element of human societies. (96-1)
desperately adv.拼命地, 失望地
destructive adj. 破坏性的
Hurricanes are killer winds, and their destructive power lies in the physical damage they can do.
飓风具有能够伤及人命，他的破坏力主要在于他能够造成物理伤害。
detain v.拘留，留住，阻止
determine v. 决定，确定，测定
digest n. 分类，摘要
dimension n. 尺寸，尺度
diminish v. (使)减少，(使)变小
diplomatic adj.外交的，老练的
discipline 1.纪律，学科
disease n. 疾病，弊病
dismiss vt. 解散，下课，开除，解职
disservice n. 伤害，虐待，
distinction n. 区别，差别，级别，特性
distinguish 1v.区别，辨别.
distress n. 悲痛，不幸， 危难，忧伤
divorce n. 离婚，脱离
domestic adj. 家庭的，国内的，驯服的，与人共处的
dominate v. 支配，占优势
dormant adj. 静止的，隐匿的
downturn n. 低迷时期
drag v. 拖，拖曳，缓慢而费力地行动
dramatic adj. 戏剧性的，生动的
drawback n. 缺点，障碍，退税
Many pure metals have little use because they are too soft, rust too easily, or have some other drawbacks.
很多纯金属用处不大，因为它们它软，很容易生锈，或者还有其他一些缺点。
dubious adj. 可疑的，不确定的
dully 1.adv. 钝地，不清楚地，迟钝地
duplicate adj. 复制的，副的，两重的，完全相同的
dynamic adj. 动力的，动力学的，动态的