haystack

/ˈheɪstæk/ 5
A haystack is a large, solid pile of hay, often covered with a straw roof to protect it, which is left in the field until it is needed. (露天)干草堆

noun [物质名词]干草堆

Searching for one man in this city is like looking for a needle in a haystack.
在这个城市里找一个人无异于大海捞针。

adjective [原级]比喻如大海捞针般难找

It's like finding a needle in a haystack.
这简直是大海捞针。

单词造句:
网友用“Haystack”造句精选
That's like looking for a needle in a haystack. 这就像大海捞针。