Biological monitoring is widely used for environmental quality evaluation.

生物监测是评价环境质量的重要手段。

Algae are the most frequently used biological monitoring indicators of waters eutrophication.

藻类是反映水体富营养化最常用的生物监测指标。

CONCLUSION: The hair zinc level might be adopted as a biological monitoring index under certain circumstances.

结论：在一定条件下，发锌水平可以作为生物监测的指标。

In addition, the prospect of using the hair lead as a biological monitoring specimen in vivo was also discussed.

文章还进一步探讨了发铅作为铅接触者活体生物检测材料的应用前景。

Objective To investigate the feasibility of urinary orthocresol levels as a biological monitoring indicator for toluene exposure.

目的探讨尿邻甲酚作为接触甲苯生物监测指标的可能性。