self-sale

例句：

1. 1. The company is promoting its products through a self-sale program.
   该公司通过一个自销计划来推广其产品。
2. 2.Self-sale is a great way to test the market for new products.
   自销是测试新产品市场的一个好方法。
3. 3.Many companies use self-sale as a means of reaching out to their customers directly.
   许多公司使用自销作为直接接触客户的一种方式。