like looking for/trying to find a needle in a haystack
释义
●like looking for/trying to find a ˌneedle in a ˈhaystackvery difficult to find大海捞针◆How can we ever find the quotation if you don’t even know what part of the book it comes from? It’ll be like looking for a needle in a haystack.你连这句话在书的哪部分都不知道,我们怎么找得到呢?这简直是大海捞针。