1
cut back on sth
表示减少开支或用量，常接on。
The company decided to cut back on advertising.
公司决定削减广告支出。
削减；缩减
cutting back — present participle of cut back
先理解核心含义，再看它在真实句子里的用法。
削减；缩减
to reduce or decrease something, such as spending, production, or use
The company decided to cut back on advertising.
公司决定削减广告支出。
常与 on 连用，如 cut back on spending
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可生成：动词变形 Verb forms。只有点击后才会开始生成。
执行切回机动。
To perform the cutback maneuver.
使用捷径；移动到某处阻止某人；切断某人
To use a short cut; to move to a location to block someone; to cut someone off
We need to cut back on screen time to get more sleep.
为了多睡一会儿，我们需要减少使用屏幕的时间。
The library is cutting back its opening hours on public holidays.
图书馆正在减少公共假日的开放时间。
My mother always cuts back on salt when cooking for my father.
我妈妈给我爸爸做饭时总是少放盐。
表示减少开支或用量，常接on。
The company decided to cut back on advertising.
公司决定削减广告支出。
表示修剪植物，sth放在cut和back之间。
She cut back the roses in the garden.
她修剪了花园里的玫瑰。
表示突然转向或折回，通常不接宾语。
The driver cut back sharply to avoid a collision.
司机急转向以避开碰撞。
Not this
We need to cut back our expenses.
Use this
We need to cut back on our expenses.
当cut back表示'削减'时，通常需要搭配介词'on'，后接削减的对象。省略'on'会导致语法错误。
Not this
I need to cut back on the roses.
Use this
I need to cut back the roses.
当cut back表示'修剪植物'时，是及物动词短语，直接接修剪对象，不需要介词'on'。使用'on'会错误地表示减少数量而非修剪。
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Dictionary facts from ECDICT, WIKTIONARY.