0 to press or be pressed against something with a circular or up-and-down repeated movement -- 擦；摩擦；搓；揉搓
He rubbed (at) the stain on his trousers and made it worse. 他去擦褲子上的汙漬，結果越擦越髒。
We rubbed some polish into the surface of the wood. 我們在木頭表面刷了一些亮光漆。
[ + obj + adj ] Alice rubbed the blackboard clean for the teacher. 愛麗斯替老師擦乾淨黑板。
Your cat keeps on rubbing itself (up) against my leg. 你的貓老是在我的腿上蹭來蹭去。
She was rubbing her hands (together) at the thought of winning. 想到會獲勝，她高興得直搓手。
The branches rubbed against each other in the wind. 樹枝在風中相互摩挲。
The chair legs have rubbed holes in the carpet. 椅子腿把地毯都磨出了洞。
My new shoes are rubbing (against/on my toe) and now I've got blisters. 我的新鞋磨腳（趾），都起泡了。
These marks will never rub off (= be cleaned off). 這些痕跡永遠都擦不掉了。
Alice rubbed the sums off (= cleaned them off) the blackboard for the teacher. 愛麗斯替老師把黑板上的算術題擦去。
1 the act of rubbing something -- 擦；摩擦；搓；揉搓
2 the particular problem that makes a situation difficult or impossible -- 問題，困難，障礙
You can't get a job unless you have experience, but there's the rub, you can't get experience unless you have a job. 沒有工作經驗你就沒法找到一份工作，但問題是，沒有工作又沒法獲得經驗。
With the back of his hand, he rubbed the stubble on his chin.
The strap had rubbed against his skin and caused irritation.
At the outset, all the musical genres and all the individuals rubbed shoulders with one another without inhibition.
She would rub my back for long stretches of time.
But there's the rub: historians are generally not interested in bringing complexity to the texts they use as sources, and for very good reasons.
