相当于Alibaba注册卖家数量35%的客户在一年期满后没有续费，这意味着公司一年要新增大约35000个新供应商客户来保持目前的销售额。
As many as 35 percent of Alibaba’s registered sellers don’t renew their one-year contracts, meaning the company needs to add about 35, 000 new suppliers a year to maintain current sales.
M：是一种从卖家到买家的文件，它包括销售商品的所有细节，比如数量、质量、价格、运输细节和付款方式。
M: it's a document from the seller to the buyer. It contains full particulars of the goods sold, such as quantity, quality, price, forwarding particulars, and terms of payment.
当价格水平过高，商品或服务的供给数量将超过需求数量，一些卖家将无法卖掉商品，因为需求的数量小于供给的商品数量。
Whenthe price is such that the quantity supplied of a good or service exceeds the quantity demanded, some sellersare unable to sell because fewer units are purchased than are offered.
Malmendier和他的同事YoungHanLee发现一些易趣高手总能从高信誉的卖家中拿到高品质的商品并且花钱也少——这需要买一定数量才有便宜。
Malmendier and colleague Young Han Lee found that some eBay winners could have gotten higher-quality goods from more reputable sellers and paid less-by buying at a set amount.
同样的，当价格低于p*时，供给数量qs小于需求数量qd 。这将导致部分顾客买不到商品，将出现买家高价求购，卖家哄抬价格的局面。
Similarly, when the price is below p*, the quantity supplied qsis less than the quantity demanded qd.
比如经济学家通过探讨一个产品的多数买家和卖家如何，共同决定了该产品的定价以及销售数量。
For instance, they examine how the multitude of buyers and sellers of a good together determine the price at which the good is sold and the quantity that is sold.
很多卖家会有不同方的价格，当你购买几千个或者成千上万的时候，往往有最小订购数量。
Many vendors give price breaks when buying hundreds or thousands of trees and have minimum order quantities.
为了维护良好的交易环境，在卖家帐户达到一定的买家满意度之前，卖家可以刊登的物品数量会受到限制。
Account privileges for sellers may be limited until they establish a good track record with us and their buyers. The number of items you can list is limited until you have fulfilled past sold items.
为了维护良好的交易环境，在卖家帐户达到一定的买家满意度之前，卖家可以刊登的物品数量会受到限制。
Account privileges for sellers may be limited until they establish a good track record with us and their buyers. The number of items you can list is limited until you have fulfilled past sold items.
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