give something a rub
collocation把某物擦一擦；给某物擦一下
He gave the table a quick rub with a cloth.
他用布把桌子快速擦了一下。
擦；摩擦；揉
rubs — plural of rub
先理解核心含义，再看它在真实句子里的用法。
擦；摩擦；揉
an act of rubbing
After a long day, a gentle rub on the shoulders can help relax the muscles.
漫长的一天过后，轻轻摩擦肩膀有助于放松肌肉。
摩擦的动作
An act of rubbing.
一组类似于泛素的蛋白质
Any of a group of proteins similar to ubiquitin
困难或问题
A difficulty or problem.
在草地滚球中,偏离正常路线的障碍
In the game of crown green bowls, any obstacle by which a bowl is diverted from its normal course.
The new shoes caused a painful rub on my heel after just an hour of walking.
新鞋子只走了一小时就在我脚后跟处造成了疼痛的摩擦。
A quick rub with a damp cloth was enough to clean the surface.
用湿布快速一擦就足以清洁表面。
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把某物擦一擦；给某物擦一下
He gave the table a quick rub with a cloth.
他用布把桌子快速擦了一下。
背部按摩；搓背
After a long day, a back rub can help you relax.
漫长的一天过后，背部按摩能帮助你放松。
胸部搽剂；止咳按摩膏
She applied some chest rub to help ease her cough.
她涂了些胸部搽剂来帮助缓解咳嗽。
肌肉按摩膏；肌肉擦剂
He bought a muscle rub for his sore shoulder.
他买了一瓶肌肉按摩膏来缓解肩膀酸痛。
问题就在这里；这才是难处
We have the money, but there's the rub: we don't have the time.
我们有资金，但问题就在这里：我们没有时间。
问题就在这里；这就是难处
I'd love to travel more, but there's the rub: I can't afford it.
我很想多去旅行，但问题就在这里：我负担不起。
（运气带来的）球路偏差；赛运
He enjoyed the rub of the green when his shot bounced off a fence and crossed the line.
他运气不错，球打在围栏上弹过门线。
啊，问题就在这儿。（出自莎士比亚《哈姆雷特》，指困难或障碍所在。）
The plan sounds perfect, but there's the rub: we don't have the budget.
这个计划听起来很完美，但问题就在这里：我们没有预算。
Use rubs naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象手在桌面上来回擦，就是 rub。
语域：neutral 常见场景：日常对话、操作说明 作名词表示“摩擦的动作”时，通常用于日常生活和具体操作说明中，语气中性；在正式书面语中较少直接使用。
cub、hub、pub、sub、tub 都以 -ub 结尾，发音均为 /ʌb/，与 rub 押韵。注意 ruby 虽然以 rub 开头，但读音为 /ˈruːbi/，与 rub 不同。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.