Unobservable
a. 难以察觉的；注意不到的；不可见的
✅ 同义词
🗣️ 情景例句
I expect you to be punctual.
我希望你守时。
The committee adjourned to a larger hall.
该委员会将会议移至大一些的会议厅举行。
They were in fashion last year and the year before last.But they're not in fashion this year.
这鞋在去年和前年时兴，而今年已不流行了。