reduce

1.[t]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。

Giving up smoking reduces the risk of heart disease.戒烟会减少得心脏病的风险。

Costs have been reduced by 20% over the past year.过去一年，成本支出已经减少了 20%。

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.[t][i]~ (sth)（使）蒸发if youreduce a liquid or a liquidreduces , you boil it so that it becomes less in quantity

3.[i](informal)减轻体重；节食to lose weight by limiting the amount and type of food that you eat

a reducing plan节食计划

4.[t]~ sth使还原；去氧；脱氧to add one or more electrons to a substance or to remove oxygen from a substance