Unobservable
a. 难以察觉的；注意不到的；不可见的
✅ 同义词
🗣️ 情景例句
Miss Chen is not in right now. She went shopping.
陈小姐现在不在，她去买东西了。
Not much.
没什么。
There are many things to be learnt when you start working.
开始工作时，你有许多东西要学。