biological concentration

例句：

1. 1.The researchers focused on the biological concentration of pollutants in the environment.
   研究人员关注了环境中污染物的生物浓缩。
2. 2.The study aims to understand the biological concentration of nutrients in soil.
   该研究旨在了解土壤中养分的生物浓缩。
3. 3.The process of biological concentration is crucial for the purification of water.
   生物浓缩过程对于水的净化至关重要。