Supply and Demand（供给和需求）
来源：
2009-11-09
普通
Supply and Demand
Demand is quantity of a product that consumers will buy at a certain price. Supply is the quantity of the product available at that price.
供给和需求
需求是消费者愿意按照某一价格购买产品的数量。供给是此价格上可以得到的产品的数量。
责任编辑：vivien
