About 80 percent of our company’s year-over-year declines in comparable sales can be attributed to shortfalls in cold-weather goods.

如果是阅读理解，那大体知道就可以了，毕竟专业术语太坑爹了。我是查字典才知道comparable sales的大概意思，不过依然不知道对应中文叫什么。姑且就叫做“同比销售额”吧

Comparable store sales refers to the revenue generated by a retail location in the most recent accounting period relative to the revenue it generated in a similar period in the past

整段大意：

我们公司同比销售额出现滑坡，这其中80%的下降额度要归因于低迷的冬季商品的销售