求翻译：(3)规模性降低。由于生鲜食品保质期短，有的仅1-2天，使得许多超市，特别是跨地区经营的超市门店自行采购商品，降低了连锁经营在统一集中采购上所能获得的规模效益。是什么意思？

(3) The scale reduced. Short shelf life of fresh food, and some only 1-2 days, making many supermarkets, especially cross-regional operation of the supermarket stores its own procurement of goods, reduce the scale of a chain operation can be obtained in the centralized procurement.

(3) scale. And fresh foods as short-term warranty, there is only 1 - 2 days, so that many supermarkets, in particular, cross-regional operation of the supermarket shop to purchase goods, reduce the chain in a centralized procurement, to the scale.

(3) large scale reduces.Because lives fresh food to guarantee the nature time to be short, some only 1-2 day, causes many supermarkets, specially trans-region manages the supermarket gate shop purchases the commodity voluntarily, reduced the chain-like management the scale benefit which can obtain i

(3) size reduction. Because of the fresh food shelf life shorter, only 1-2 day, many supermarkets, especially in supermarket stores across the area purchasing goods on their own, reducing the chain on a unified centralized purchasing to obtain economies of scale.

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