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polygraph [noun]
polygraph 常作定语，修饰 test、examiner、result 等名词。
The suspect agreed to take a polygraph test.
嫌疑人同意接受测谎测试。
多种波动描记器
先理解核心含义，再看它在真实句子里的用法。
多种波动描记器
a medical device that records several bodily processes at the same time, such as pulse, blood pressure, and breathing
The suspect agreed to take a polygraph test.
嫌疑人同意接受测谎测试。
测谎仪,测量并记录多项生理指标(如血压、心率、呼吸和皮肤电导)以检测说谎的设备。
A device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions is being posed to a subject, in an attempt to detect deception.
表示单一音位的一组字母。
A group of letters that represent a single phoneme.
被视为单个项目的任意字母组。
Any group of letters treated as a single item.
涉猎多种题材的作家。
An author who writes on many subjects.
During the medical examination, the technician used a polygraph to record the patient's pulse, breathing, and perspiration at the same time.
体检时，技术员用多导生理记录仪同时记录病人的脉搏、呼吸和出汗情况。
The doctor attached the polygraph's sensors to the volunteer's arm and watched the readings on the screen.
医生把多导生理记录仪的传感器连接到志愿者的手臂上，并查看屏幕上的读数。
A polygraph with several sensors can monitor heart rate and blood pressure during an experiment.
带有多个传感器的多导生理记录仪可以在实验期间监测心率和血压。
polygraph 常作定语，修饰 test、examiner、result 等名词。
The suspect agreed to take a polygraph test.
嫌疑人同意接受测谎测试。
take a polygraph 是固定搭配，表示接受测谎；也可说 take a polygraph test。
All new employees must take a polygraph during the background check.
所有新员工在背景调查期间都必须接受测谎测试。
pass a polygraph 表示测谎结果显示未撒谎；相反说 fail a polygraph。
She passed the polygraph, so the police no longer suspect her.
她通过了测谎测试，因此警方不再怀疑她。
Not this
He was asked to take polygraph.
Use this
He was asked to take a polygraph.
polygraph 是可数名词，单数形式前需要冠词（a/the）或限定词；中文没有冠词系统，学习者容易漏掉 a。加上 a 后句子才符合英语语法。
Not this
He did a polygraph test.
Use this
He took a polygraph test.
英语中表达“参加测试”的固定搭配是 take a test（或 undergo a test），而不用 do。中文的“做”对应多个动词，容易直译成 do；改为 took 后搭配正确。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
测谎测试
The company requires all security staff to pass a polygraph test.
公司要求所有安保人员通过测谎测试。
接受测谎
He refused to take a polygraph during the investigation.
调查期间他拒绝接受测谎。
未通过测谎
The suspect failed the polygraph and was questioned further.
嫌疑人未通过测谎，随后受到进一步讯问。
测谎结果
The polygraph results were not allowed as evidence in court.
测谎结果不被允许作为法庭证据。
测谎员
A certified polygraph examiner conducted the interview.
一名持证测谎员进行了这次访谈。
我想我需要一台测谎仪，来确认你是不是真心的。
From the song 'What You Know' by Two Door Cinema Club (2010). The singer sings about not trusting his lover and jokingly wants a polygraph to test whether she is honest.
出自 Two Door Cinema Club 的歌曲《What You Know》（2010）。歌词唱出歌手对爱人不信任的心理，开玩笑说需要一台测谎仪来验证对方是否诚实。
Use polygraph naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：poly=多，graph=记录，测谎仪同时记录多项生理波动，故称polygraph。
语域：formal 常见场景：medical diagnostics、clinical monitoring、physiology research 本义项为医学术语，多用于临床监测、生理研究等正式或技术性场景，日常口语中不常用。
复数形式为 polygraphs。
Dictionary facts from ECDICT, WIKTIONARY.