cable hay stack 绞盘式干草堆垛机
derrick hay stack 转臂式干草堆垛机
hay stack wagon 草垛运输车
a hay stack 干草垛
loose hay stack wagon system 疏松垛草车系列
n a hay stack 大海捞针
a stack of hay 一堆干草
N-COUNT 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
PHRASE If you are trying to find something and say that it is like looking for a needle in a haystack, you mean that you are extremely unlikely to find it. 比喻如大海捞针般难找
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