She spoke in a singsong voice that made the lecture hard to follow.

她用单调的语调讲话，使得讲座很难跟上。

He narrowed his eyes and responded in a singsong voice.

他眯缝着眼睛,用平淡的声调做了回答.

Colin opened the will, and began to read it out in a singsong voice.

科林打开遗嘱, 开始用一种单调的声音大声地朗读.