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就价格和交期进行讨价还价是很普通的。
Haggling over price and delivery date is common.
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让一个单调乏味的普通矿工同一个精明事故的商人讨价还价可谓难于上青天，而这些商人却正是原钻的主要客户。
A plodding general miner, it may find it hard to haggle with the canny and highly knowledgeable dealers who are the prime customers for rough diamonds.
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