他单调的语调让整个讲座难以忍受。

His ___monotonous tone made the entire lecture unbearable.

数据录入的单调例行工作很快导致了职业倦怠。

The ___monotonous routine of data entry quickly led to burnout.

单调的讲述方式甚至会破坏最有趣的内容。

A ___monotonous delivery can undermine even the most interesting content.