monotone

1. N-COUNT If someone speaks in a monotone, their voice does not vary at all in tone or loudness and so it is not interesting to listen to. 一成不变的声音; 单调的语调[usu sing, also 'in' N]

The evidence was read out to the court in a dull monotone. 证供被呆板地在庭上宣读了一遍。

2. ADJ A monotone sound or surface does not have any variation in its tone or colour. (声音或表层)单调的; 无变化的[usu ADJ n]

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。