Indiscoverable
a. 难以发现的
🗣️ 情景例句
Good. Tell Mr. Gao at the factory to keep up the good work.
很好，请告诉工厂的高先生继续努力。
Coming events cast their shadows before them.
山雨欲来风满楼。
OK. Thanks.
好吧。谢谢。