Embedded within the explicit plot of the simile is a secret, a kind of buried narrative, and it's a hidden story that illustrates Satan's self-destruction.

深藏在这个比喻精巧的情节布局里的，是一个秘密，一个被深埋已久的故事，一个隐藏着的，阐述了撒旦自我毁灭的故事。

耶鲁公开课 - 弥尔顿课程节选

It's not as popular as Central Park. But I feel like it's kind of a hidden gem.

它并没有中央公园有名。但我觉得它是一枚被隐藏的瑰宝。

纽约的公园 - SpeakingMax英语口语达人

That has to be under the covers.

必须被隐藏起来。

麻省理工公开课 - 计算机科学及编程导论课程节选