求翻译：你方的还盘我们无法接受，但出于开拓市场的考虑，首笔交易给予极优惠的报价，以增强商品的竞争能力，该发盘有效期为八天是什么意思？

Your offer we can not accept, but consider for opening up markets, the first transaction to give a very favorable offer in order to enhance the competitiveness of the goods, the offer is valid for eight days

Do you side of the also-we are unable to accept, but, for opening up markets, taking into account, the first transaction to give a discount off of the quotation, in order to enhance the competitiveness, and the offer is valid for 8 days

You bargain we to be unable to accept, but stemming from develops the market the consideration, the first transaction gives extremely the preferential benefit quoted price, strengthens the commodity competitive ability, this round plate term of validity is eight days

We cannot accept your counter-offer, but for market reasons, first deal make you extremely favourable offer in order to enhance the competitiveness of goods, the offer is valid for eight days

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