在英语越来越重要的21世纪，学好英语成了大学生的首要目标。为帮助大学生更好地掌握英语知识，特提供以下文章：
51. decision on/against 做/不做……的决定，如：
A decision on this matter is pending. 此事即将作出决定.
The committee reversed its decision on import quota. 委员会取消了对进口货物的配额的决定。
52. decrease in sth ……的减少，如：
A decrease in signal power as measured between two points. 信号能量在两点间测量出来的减小量。
There has been a steady decrease in population in this city. 这个城市的人口在持续下降。
53. defence against 防御,保卫，如：
Trees are a defence against the wind. 树是一种防风物。
The country put up a strong defence against the enemy 's invasion 为了抵制敌人的侵略,这个国家布置了坚固的防御工事
54. delegate to 参加……的代表，如：
He was elected as a delegate to the annual conference. 他被选为年会代表。
55. demand for 对……的需求，如：
Demand for hospital services remained high. 居民对医院服务的需求仍然殷切。
A fall in demand for oil tankers has put/placed thousands of jobs in the shipbuilding industry in jeopardy. 油轮需求量下降使造船业成千上万的工作职位受到威胁.
56. departure from 离开，如：
Ordered curry as a departure from his usual bland diet. 他没有点通常吃的淡而无味的食品，而要了咖哩食品
The new system is a departure from our usual methods. 这套新办法不同于我们惯用的方法。
57. desire for sth 渴望， 如：
It is obvious that they have no desire for peace. 很显然，他们没有和平的愿望。
They had little desire for wealth/to get rich. 他们对财富[致富]无大欲望.
58. differences between不同,差异，如：
Differences between employers and workers go deep. 雇主和工人间的分歧很大。
The differences between the pictures are very slight. 这两幅画差别很小.
59. dispute about 争论,辩论，如：
It is ridiculous to dispute about such a thing. 为这样的事情而争论简直荒谬可笑。
There will be a dispute about the rightful succession to her estate. 对于她产业的合法继承权将有一场争论。
60. distinction between 区别，如：
He drew a quite artificial distinction between men and women readers. 他把男读者和女读者硬是人为地区分开来.
We should make a distinction between right and wrong. 我们应该分清是非。