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use a vibrator to [verb] [body part]
use ... to do sth 表示“用……做某事”，不定式说明目的。
He used a vibrator to massage his shoulders.
他用振动按摩器来按摩肩膀。
振动器；振动装置
先理解核心含义，再看它在真实句子里的用法。
振动器；振动装置
a mechanical device that vibrates or produces vibratory motion
He used a vibrator to massage his shoulders.
他用振动按摩器来按摩肩膀。
振动器；使振动的装置。
A device that vibrates or causes vibration.
I bought a small vibrator to massage my neck after long hours at work.
我买了一个小型振动按摩器，以便在长时间工作后按摩脖子。
The massage therapist uses a vibrator to help clients relax their back muscles.
按摩理疗师用振动按摩器帮助顾客放松背部肌肉。
Put the vibrator on the painful area and move it slowly in circles.
把振动按摩器放在疼痛部位，然后缓慢地画圈移动。
use ... to do sth 表示“用……做某事”，不定式说明目的。
He used a vibrator to massage his shoulders.
他用振动按摩器来按摩肩膀。
produce 在这里意为“产生”，后面常接 vibration、motion 等名词。
A vibrator produces a continuous vibration.
振动器产生持续的振动。
介词 for 放在名词后作定语，表示用途或适用部位。
She bought a vibrator for her back.
她买了一个用于背部的振动按摩器。
Not this
My phone vibrator when it receives a message.
Use this
My phone vibrates when it receives a message.
vibrator 是名词，意为“振动器”，句中需要动词“振动”，应使用 vibrate 的第三人称单数形式 vibrates。
Not this
She bought new vibrator at the store.
Use this
She bought a new vibrator at the store.
vibrator 是可数名词，单独使用时前面需要加冠词或其他限定词，这里应加 a 表示“一个”。
Not this
I felt a vibrator in my pocket when the phone rang.
Use this
I felt a vibration in my pocket when the phone rang.
vibrator 指“振动器”这种装置，而“感觉到的振动”应是 vibration。此句表达手机来电时的震动感，应用 vibration。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
混凝土振动器
The workers used a concrete vibrator to remove air bubbles from the wet concrete.
工人们用混凝土振动器去除湿混凝土中的气泡。
电动振动器
An electric vibrator can help relieve muscle tension.
电动振动器可以帮助缓解肌肉紧张。
手持式振动器
This handheld vibrator is light enough for daily use.
这款手持式振动器很轻，适合日常使用。
内置振动器
The massager includes a built-in vibrator as well as heat.
这款按摩器除了加热功能外，还带有内置振动器。
振动模式
Put your phone in vibrator mode so you don't disturb others.
把手机调到振动模式，这样就不会打扰别人。
振动马达
The gadget's vibrator motor buzzes when the timer ends.
计时结束时，这个小工具的振动马达会嗡嗡作响。
Use vibrator naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
vibrate（振动）去掉末尾e再加-or（表器具）就是vibrator，振动按摩器会不停地振动。
语域：neutral 常见场景：产品说明书、工程手册、按摩保健 该词通常为中性，多用于技术说明或按摩产品描述；口语中使用时可能更随意，需根据上下文判断具体所指。
These words all share the spelling chunk -ator and end with the same /eɪtə/ sound (or /eɪtər/ in American English), so they rhyme with the end of vibrator. Beware of root lookalikes: vibrant /ˈvaɪbrənt/ and vibrate /vaɪˈbreɪt/ look similar but have different endings and do not rhyme with vibrator.
Dictionary facts from ECDICT, WIKTIONARY.