reduce

1.reduce（使…不得不）的宾语后面接to和动名词比接不定式普通，如In those days poverty reduced many to begging in the streets 比In those days poverty reduced many to beg in the streets普通。

2.下面两句意思不同：

• Production was reduced to thirty per cent.（生产减少到百分之三十。）
• Production was reduced by thirty per cent.（生产减少了百分之三十［减少到百分之七十］。）