monotone

单调的语调、平板的声调

He read the whole announcement in a flat monotone.

他用毫无起伏的平板语调念完整份公告。

单色调、单一色调

The living room is decorated in a soft gray monotone.

客厅以柔和的灰色单一色调布置。

单调的、无起伏的

Her monotone delivery made the lecture hard to follow.

她毫无起伏的讲述方式让这场演讲很难听下去。

单色的

He always wears a monotone black outfit to work.

他上班总是穿一身单色的黑。