polyanion

例句：

1. 1. Polyanions are important in the treatment of diseases such as cancer.
   多聚阴离子在治疗癌症等疾病中起着重要作用。
2. 2. Polyanions can be used to prevent the formation of blood clots.
   多聚阴离子可以用于预防血栓的形成。
3. 3. Polyanions have been found to have antibacterial properties.
   多聚阴离子被发现具有抗菌性质。