动词 reduce 在英语中意为“减少、降低、缩小”，常与其他介词或副词搭配形成固定短语。 正确使用这些搭配能让你的英语更自然、准确。以下是最常见且实用的 reduce 短语搭配，附带中文释义与例句。
reduce to
简化为；使沦为
The complex theory was reduced to a few simple sentences.
After the fire, the house was reduced to ashes.
reduce by
减少了（具体数量或比例）
The company reduced its staff by 20% last year.
Prices were reduced by half during the sale.
reduce from ... to ...
从……减少到……
The journey time has been reduced from 3 hours to just 90 minutes.
Calorie intake should be reduced from 2500 to 2000 per day.
reduce in size/amount/number
在尺寸/数量/数目上减少
The glacier has significantly reduced in size over the past decade.
Applications for the course have reduced in number this year.
be reduced to doing something
被迫做某事（常含无奈或窘迫之意）
After losing his job, he was reduced to selling newspapers on the street.
She was reduced to tears by his harsh words.
reduce something to writing
将某事写成文字（正式用法）
Please reduce your agreement to writing before signing.