C2 adjective /dʒɪˈdʒuːn/
jejune
幼稚 / 浅薄 / 无趣
Meaning
Naive, simplistic, and superficial; also dull or uninteresting.
Example
The professor dismissed the essay as jejune and lacking depth.
教授把这篇文章视为幼稚且缺乏深度,予以拒绝。