卖方应当承担任何保证已延迟的交付准时到达买方而产生的额外运费。
The SUPPLIER shall have to pay for any extra freight charges incurred in ensuring that delayed deliveries reach PURCHASER on time.
我很遗憾的告诉你，我再强调一下我们产品是质量保证的，而且我对你是免运费的。
I'm sorry to inform you that I really have to emphasize the quality guarantee of our products and we'll offer you the shipping free of charge.
运输问题是研究在保证货物尽快运抵目的地的前提下使总运费最少的运输问题。
B-transportation problem is to minimize total transportation cost subject to that all of the goods should be transported from each source to each destination as quickly as possible.
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