減少的英文：
1.to reduce; to decrease; to lessen; to cut down; to diminish; to abate; to curtail

reduce是什么意思：
v. 缩减，减小；简化；将…还原；节食；降职

be reduced to (a) pulp
变成浆状,成纸浆 [软块]

They held a sale to reduce their inventory.
他们降价出售库存货物。

To reduce in rank;demote.
使降职，使…降级

decrease是什么意思：
v. 减小，减少
n. 减小，减少；减少量，减少额

Decrease indent of paragraph one level /Decrease Indent
把段落缩进程度减小一个等级/减小缩进

Is your production on the decrease?
你们的产量在减少吗？

The decrease in salary payable is $20.
应付工资减少额是20美元。

lessen是什么意思：
v. 缩小；减少，减轻

To lessen the oppressiveness,trouble,or severity of.
减轻…的负担、麻烦或严重性

These measures can't help to lessen the existing tension.
这些措施不能帮助缓和现在的紧张局势。

When it is on the boil——we lessen the fire and scum.
当汤滚了之后，我们把火减小然后剽除汤里的浮渣。