期权是一种只给买方带来权利，而不需买方承担义务，使其可在未来以某一确定价格买卖资产的衍生品。
An option is a derivative contract that gives the purchaser the right, but not the obligation, to buy or sell an asset at a certain price.
本课程研究了一些影响市场营销决策的基本因素，例如买方行为、竞争、定价、广告、分销和销售方式等。
The course examines the fundamental issues that influence marketing decisions, such as buyer behavior, competition, pricing, advertising, distribution and selling methods.
卖出产品由买方确定价格，卖方不得强行推销。
The buyer to determine the price, the seller should not force to sell.
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