dye pooling

例句：

1. 1. The dye pooling in the water is a sign of pollution.
   水中的染料聚集是污染的标志。
2. 2. The dye pooling in the water was caused by the runoff from the nearby factory.
   水中的染料聚集是由附近工厂的排放造成的。
3. 3. The dye pooling in the water will be harmful to the environment.
   水中的染料聚集将对环境造成危害。