Indiscoverable
a. 难以发现的
🗣️ 情景例句
The security guard asked the stranger for some I.D.
保安要求陌生人出示身份证。
I know the boy whose father is a college president.
我知道那个男孩的父亲是大学校长。
The harder you work, the richer you will become.
工作越努力，你就越富裕。