Indetectable
a. 不可察觉的,不易发现的
🗣️ 情景例句
This has been a hard course for me.
这门课对于我来说很难。
It's not the gay coat that makes the gentleman.
君子重德不重衣。
Good morning. Could I have some bottles of milk, please?
早上好。我想买几瓶牛奶？