辨析 A) decrease B) reduce C) condense D) contract

decrease
[di:ˈkri:s]
vt. & vi.
(使)缩短; 减小, 减少
The traffic accidents in the city decreased last year.
该城市去年交通事故减少了。
n.
减小, 降低
There has been some decrease in imports.
进口货物有所减少。
减少(量)
The decrease in sales was almost 20 percent.
销售量差不多减少了20％。

reduce
[riˈdju:s]
vt.
缩减, 减少; 降低
He won't reduce the rent of our house.
他不肯减少我们住房的租金。
降低某人的级别或地位; 降职
使…陷入某种状态[状况]中
Hunger reduced him to steal.
饥饿使他不得不行窃。
将…概括[简化]
The rising sun quickly reduced the fog.
升起的太阳很快驱散了晨雾。
将…还原
A doctor can reduce a fracture or dislocation.
医生能使骨折或脱臼复位。
vi.
减轻体重; 节食
She has been reducing for the last few weeks.
最近几个星期她一直在节食。

condense
[kənˈdens]
vt. & vi.
(使)变稠或变浓; 浓缩
Soup condenses when boiled.
汤煮过后就浓了。
(使)凝结
Steam is condensed in the condenser.
蒸汽在冷凝器中凝结。
vt.
简说, 摘要,