词典释义：
释义
n.
a continuing sound, especially of someone's voice, that is unchanging in pitch and without intonation
单调的语调；单调的声音
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he sat and answered the questions in a monotone . 他坐着用单调的声音回答问题。
adj.
(of a voice or other sound)unchanging in pitch; without intonation or expressiveness
（嗓音等）单调的，无变化的
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his monotone reading of the two-hour report. 他语调一成不变地念了两个小时的报告。
〈喻〉 无色彩的；不活泼的；单一的；死气沉沉的
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the monotone housing estates of the big cities. 大城市死气沉沉的住宅区。
词源
"mid 17th cent.: from modern Latin