scratch an itch
collocation挠痒
He scratched the itch on his arm.
他挠了挠胳膊上发痒的地方。
挠；搔；抓（痒）
先理解核心含义，再看它在真实句子里的用法。
挠；搔；抓（痒）
To rub a part of your body with your nails, claws, etc., especially to stop an itch.
The cat is scratching the door.
猫正在抓门。
用尖锐物体摩擦表面,尤指生物用指甲、爪子等挠痒。
To rub a surface with a sharp object, especially by a living creature to remove itching with nails, claws, etc.
用粗糙的材料摩擦皮肤引起刺激感；导致瘙痒。
To rub the skin with rough material causing a sensation of irritation; to cause itching.
用尖锐物体在表面留下划痕。
To mark a surface with a sharp object, thereby leaving a scratch (noun).
获得这样的划痕。
To get such scratches.
scratch
Base
原形
scratches
3rd person
第三人称单数
scratching
-ing
现在分词
scratched
Past
过去式
scratched
Past participle
过去分词
The cat scratches the furniture.
猫抓家具。
He scratched his arm on a branch.
他胳膊被树枝划伤了。
She has scratched the paint off the wall.
她已经把墙上的油漆刮掉了。
He scratched his arm where the mosquito bit him.
他挠了挠蚊子叮咬的手臂。
We had to scratch the whole plan.
我们不得不取消整个计划。
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挠痒
He scratched the itch on his arm.
他挠了挠胳膊上发痒的地方。
划掉
Please scratch out the wrong word and write the correct one.
请划掉错误的单词并写下正确的。
刮唱片
The DJ scratched a record live on stage.
DJ 在舞台上现场刮唱片。
抓门
The cat scratched at the door until I let her in.
猫一直抓门，直到我放它进来。
划花汽车
Be careful not to scratch your car when parking in that narrow garage.
在那个狭窄的车库里停车时，小心别划花你的车。
抓伤某人的脸
The two boys started fighting and one scratched the other's face.
两个男孩打了起来，其中一个抓伤了另一个的脸。
触及皮毛；浅尝辄止
The report only scratches the surface of the problem.
这份报告只是触及了问题的皮毛。
帮某人的忙（尤指为日后回报）
If you scratch my back, I'll scratch yours.
你帮我一把，我也帮你一把。
感到困惑；冥思苦想
The sudden change left everyone scratching their heads.
这个突然的变化让所有人都感到困惑。
你帮我挠背，我也帮你挠背。
This saying uses the literal action of scratching an itch to describe mutual favors, meaning one good turn deserves another.
这句谚语用挠痒这一具体动作来比喻互相帮助，意思是你帮别人，别人也会帮你。
揭开情人的外表，看到的是敌人。
To scratch beneath a lover's charming surface, as this line suggests, is to uncover an enemy.
正如这句话所暗示的，揭开情人迷人的外表，就会暴露一个敌人。
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记 scratch：词里有 rat（老鼠），猫抓老鼠，挠出划痕——挠、划、抓伤都靠它。
语域：neutral 常见场景：日常对话、一般书面叙述、描述皮肤发痒或动物挠痒 作动词表示‘挠痒’或用爪抓时，通常用于日常口语和一般书面语，语气自然中性。若指在表面划出痕迹，也多见于日常描述。正式学术文体中较少直接使用该词。
These words all rhyme with scratch, sharing the stressed vowel and following sounds /ætʃ/. Note that spellings like 'stretch' (/stretʃ/) or 'screech' (/skriːtʃ/) look similar but do not rhyme with scratch.
Dictionary facts from ECDICT, WIKTIONARY.