科学家在研究如何控制湖泊中的蓝藻过度繁殖。

Scientists are studying how to control the overgrowth of ___cyanobacteria in lakes.

蓝藻通过固氮作用为池塘生态系统提供重要养分。

___Cyanobacteria provide essential nutrients to pond ecosystems through nitrogen fixation.

湖面上出现的蓝藻对游泳者的健康构成威胁。

The ___cyanobacteria bloom in the lake poses a health risk to swimmers.