Definition
Used to express a lack of understanding or exasperation regarding something that someone has done.
（用於表達不理解或對某事感到惱火）我不明白。
I don't know why I can never find my keys every time I'm about to leave.
我不明白為什麼每次要出門的時候都找不到我的鑰匙。
I don't know why they have to be so rude to me, I didn't do anything wrong.
我不明白他們為什麼要對我這麼無禮，我沒有做錯任何事。
I don't know why this piece of technology is so complicated to understand.
我不明白為什麼這項技術這麼難理解。