COSR

例句：

1. 1. The company's success is closely related to the quality of its products and services.
   该公司的成功与产品质量和服务密切相关。
2. 2. The cost-effectiveness ratio is a key factor in determining the profitability of a product or service.
   成本效益比是决定产品或服务盈利能力的关键因素。
3. 3. The customer satisfaction rate has been steadily increasing over the past few years.
   顾客满意度率在过去几年中稳步上升。