created sense approved 大海捞针/大海撈針 · dàhǎilāozhēn · needle in a haystack
大海捞针 / 大海撈針
dàhǎilāozhēn
needle in a haystack
To fish for a needle in the sea; to engage in a search that is virtually impossible or extremely difficult to succeed.
在这座大城市里找一个多年未见的朋友,简直是大海捞针。
idiom