主要是去年同期超低价促销，毛利损失的翻译：Mainly ultra-low-cost promotions over the same period last year, gross margin loss 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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Mainly ultra-low-cost promotions over the same period last year, gross margin loss

Mainly was same time last year ultra low price promotion, the gross profit loss

Main is ultra low prices over the same period of last year, gross profit losses

Mainly ultra-low-cost promotions over the same period last year, gross margin loss