1
in a monotone
常用在表示说话方式的动词（如 speak、read、say）后，作方式状语。
The teacher read the notice in a monotone that made everyone sleepy.
老师用单调的语调朗读通知，让大家都昏昏欲睡。
单调（的声音）；平调
先理解核心含义，再看它在真实句子里的用法。
单调（的声音）；平调
A single unchanging tone in speech or other sound.
The teacher read the notice in a monotone that made everyone sleepy.
老师用单调的语调朗读通知，让大家都昏昏欲睡。
单一不变的语调或声音
A single unvaried tone of speech or a sound.
始终如一的写作风格
A piece of writing in one strain throughout.
The professor spoke in a monotone, and the class became drowsy.
教授用单调的语调讲话，全班都犯困了。
She read the poem in a soft monotone, which made it sound sad.
她用轻柔的平调朗读这首诗，使诗听起来很悲伤。
His phone's alarm was a harsh monotone that repeated every morning.
他的手机闹钟是一种刺耳的单调声音，每天早上重复。
常用在表示说话方式的动词（如 speak、read、say）后，作方式状语。
The teacher read the notice in a monotone that made everyone sleepy.
老师用单调的语调朗读通知，让大家都昏昏欲睡。
强调某种持续而无变化的声音。
The monotone of the engine lulled the passengers to sleep.
发动机单调的声音让乘客们昏昏入睡。
用于描述声音或话语本身缺乏起伏。
His speech was a monotone, with no change in pitch or rhythm.
他的演讲语调单一，音高和节奏都没有变化。
Not this
His reading voice was monotone.
Use this
His reading voice was monotonous.
monotone 是名词，表示“单调的语调”，而描述人或声音“单调的”应用形容词 monotonous。中文“单调”既可作形容词也可作名词，直译导致词性误用。
Not this
She recited the poem in monotone.
Use this
She recited the poem in a monotone.
monotone 作“单调的语调”是可数名词，固定搭配 in a monotone 中必须带不定冠词 a；中文没有冠词概念，因此常漏用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
以单调的语调
The tour guide spoke in a monotone, so I lost interest quickly.
导游以单调的语调讲解，我很快就失去了兴趣。
单调的嗓音
Her monotone voice made the presentation hard to listen to.
她单调的嗓音让这场演示很难听下去。
平淡无奇的单调语调
He delivered the bad news in a flat monotone.
他用平淡无奇的单调语调宣布了这个坏消息。
低沉的单调声音
The air conditioner hummed in a low monotone all night.
空调一整夜发出低沉的单调嗡嗡声。
Use monotone naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：把mono记作“单一”，tone是“音调”，想象老师用一个音调讲课，单一音调就是单调。
语域：neutral 常见场景：日常对话、演讲、课堂朗读 作名词时，monotone 多指说话或朗读时单一、没有起伏的语调；在描述他人说话方式时比较常见，语气中性，不算生僻或特别正式。
These words share the final /təʊn/ sound of the '-tone' in monotone (/ˈmɒnətəun/). They are true rhymes with each other (stressed /əʊ/ + /n/). In monotone, the main stress falls on the first syllable, so the final -tone is lighter. Beware lookalikes that sound different: monotony /məˈnɒtəni/ and monotonous /məˈnɒtənəs/.
Dictionary facts from AI_FALLBACK, ECDICT, WIKTIONARY, WORDNET.