2.to reduce sb/sth to sth
(change state or condition to)使…陷入；使…沦为
Politics has been reduced to class struggle.政治已经沦为阶级斗争。
They were reduced to extreme poverty.他们陷入极端贫困的状态。
He was reduced to despair.他陷入了绝望。
3.(subjugate)征服；制服；使服从
The whole country was reduced after three months.整个国家三个月后沦陷。