bromine number

例句：

1. 1. The brine in the ocean contains a significant amount of bromine.
   海洋中的盐水含有大量的溴。
2. 2. Bromine is used as an additive in many products to improve their properties.
   溴被用作许多产品的添加剂，以改善其性能。
3. 3. The bromine number is an important indicator of the environmental impact of industrial processes.
   溴化物指数是衡量工业过程对环境影响的一个重要的指标。