a needle in a haystack
大海撈針
口語·形容極難找到的事物
英文釋義
something that is very difficult or impossible to find or locate
例句
Finding my lost earring in this park is like looking for a needle in a haystack.
典故來源
源自16世紀英國農業社會,干草堆中找針極為困難,后廣泛用于形容極難尋找的事物。