Decrease和reduce有什么区别？

reduce是一种主观的减少、降低，主语是使减少的外力，to make something smaller or less in size, amount, or price。
decrease是一种客观的减少、下降，主语是减少的东西（size, amount, or price etc.）,to go down to a lower level, or to make something do this。

拓展资料

 decrease

1、verb

~ (from sth) (to sth)

（使大小、数量等）减少，减小，降低 
to become or make sth become smaller in size, number, etc.

[V] The number of new students decreased from 210 to 160 this year.

今年新生人数从210减少到160。

The price of wheat has decreased by 15%.

小麦价格降低了15%。

This species of bird is decreasing in numbers every year.

这种鸟的数量在逐年减少。

a decreasing population

逐渐减少的人口

[VN] People should decrease the amount of fat they eat.

人们应减少脂肪的摄入量。

反义词： increase

2、noun

[C, U] ~ (in sth) | ~ (of sth)

减少；降低；减少量 
the process of reducing sth or the amount that sth is reduced by

同义词： reduction

There has been some decrease in military spending this year.

今年的军费开支有所减少。

a decrease of nearly 6% in the number of visitors to the museum

参观博物馆人数下降将近6%。、

reduce

1、verb

[VN] ~ sth (from sth) (to sth) | ~ sth (by sth)

减少，缩小（尺寸、数量、价格等） 
to make sth less or smaller in size, quantity, price, etc.

Reduce speed now (= on a sign) .

减速行驶。

Costs have been reduced by 20% over the past year.

过去一年，各项费用已经减少了20%。

Giving up smoking reduces the risk of heart disease.

戒烟会减少得心脏病的风险。

The number of employees was reduced from 40 to 25.

雇员人数从40人减少到了25人。

The skirt was reduced to £10 in the sale.

在大减价期间，这条裙子减价到10英镑。

2、[VN , V] （使）蒸发 

if you reduce a liquid or a liquid reduces , you boil it so that it becomes less in quantity。

to lose weight by limiting the amount and type of food that you eat.

a reducing plan

节食计划

4、[VN] (chemistry 化) 使还原 

to add one or more electrons to a substance or to remove oxygen from a substance

compare oxidize.