benchmark concentration

例句：

1. 1.The benchmark concentration for this product is 50 parts per million.
   该产品的基准浓度为每百万分之五十。
2. 2.The company has set a benchmark concentration for the industry.
   该公司已为该行业设定了基准浓度。
3. 3. The research team aims to achieve a benchmark concentration of 90% in the next year.
   研究团队的目标是在明年实现基准浓度达到90%。