"unvarying tone in music or speaking," 1640s; see monotony. OED says use of the word as a noun "is peculiar to Eng." Related: Monotonic; monotonically.
权威例句
1. The evidence was read out to the court in a dull monotone.
证据被当庭呆板地宣读了一遍。
2. He spoke in a flat monotone.
他说话单调低沉。
3. He was seen on TV delivering platitudes about the crisis in a monotone voice.
人们看到他在电视上念经似地就危机问题老调重弹。
4. She talked in a deep nasal monotone.
她说话鼻音很重,语调单一。
5. These are just some monotone concrete buildings.