anionic dye

例句：

1. 1. The solution is anionic and can be used to remove oil from water.
   该溶液是离子型的，可以用来从水中去除油。
2. 2.The anionic surfactant helps to reduce the surface tension of the solution.
   这种离子型表面活性剂有助于降低溶液的表面张力。
3. 3.In aqueous solutions, anions are negatively charged ions that dissociate into their constituent atoms or molecules.
   在水溶液中，阴离子是由其构成原子或分子解离而成的带负电的离子。