qualitative control

例句：

1. 1. The company implemented a quality control system to ensure product consistency.
   该公司实施了一个质量控制系统，以确保产品一致性。
2. 2. The research team conducted a quantitative control study to evaluate the effectiveness of the new treatment.
   研究团队进行了一项定量控制研究，以评估新治疗的有效性。
3. 3. The quality control department is responsible for monitoring and ensuring product quality duringproduction.
   质量管理部负责在生产过程中监控和确保产品质量。