The sky was monotonously grey.天空是一成不变的灰色。

The days dragged on, all monotonously alike.日复一日, 单调乏味。

The rain dripped monotonously from the trees.雨水从树上滴落, 发出单调的滴嗒声。

The class was chanting monotonously from its reading books.全班同学一个声调地反复诵读着读本。