to drone on
[phrase form: drone]
01
単調に話す, 長々と退屈な話をする
to speak at length in a tedious manner, often to the point of being boring or uninteresting
例
The professor tended to drone on during lectures, making it challenging for students to stay engaged.
教授は講義中に長々と退屈な話をしがちで、学生が集中し続けるのが難しかった。
