pollution indicating organism

例句：

1. 1. The pollution-indicating organisms are crucial formonitoring the level of pollution in the water.
   污染指示生物对于监测水中的污染水平至关重要。
2. 2. The researchers found that certain bacteria couldserve as pollution indicators.
   研究人员发现某些细菌可以作为污染的指示物。
3. 3. The study aimsto identify pollution indicators that can helpus understand the impact of human activities onthe environment.
   该研究旨在识别出能够帮助我们了解人类活动对环境影响的指示物。