usu. in sing.
- 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：
he sat and answered the questions in a monotone.
他坐着用单调的声音回答问题。
1
- (of a voice or other sound) unchanging in pitch; without intonation or expressiveness（嗓音等）单调的, 无变化的：
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。
1.1
- figurative without colour, vividness, or variety; dull〈喻〉无色彩的; 不活泼的; 单一的; 死气沉沉的：
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 monotonus, from late Greek monotonos.