冬天囤积粮食英文可以说是 "hoarding grain during the winter" 或 "storing grain for the winter."

这个短语的来源可以追溯到古代的农业社会，当时人们会在冬天囤积足够的粮食，以应对冬天的饥荒。因此，这个短语主要指人们为了应对冬天的粮食短缺而储存大量粮食。

下面是一些英文例句及其中文翻译：

The villagers were forced to hoard grain during the winter in case of famine. (村民们被迫在冬天囤积粮食以防饥荒。)
Many farmers in the region store grain for the winter to feed their pvestock. (该地区的许多农民会在冬天储存粮食喂养家畜。)
We need to start hoarding grain now in order to have enough to last through the winter. (我们现在就需要开始囤积粮食，以便在冬天有足够的粮食。)