a head scratcher 費解之事
英文釋義
( FORMAL ) Something that confuses; a puzzler.
例句
EXAMPLE: My friend's sudden departure from the company at which he worked happily for ten years is a real head scratcher, and I can't understand it.
我的朋友突然離開他快樂工作瞭十年的公司實在讓人費解，我想不明白。
