在网上找到了这样的解释，希望能帮助你：

The Selling Concept and the Marketing Concept are two different concepts of Marketing that related to the evolution of marketing in the world.

The Selling Concept holds that in order for the firm to be profitable, it must focus on sales of the product regardless of the orientation of the product itself. This concept became popular after World War 2.

On the other hand, the Marketing Concept is one of the recent concepts in marketing. It holds that a firm must identify the needs of the consumer and then plan, price, promote and distribute its product according to the demands of the consumer.

谢谢了，好的