ionic polymer

例句：

1. 1.Ionic compounds are formed when atoms or ions combine to form a stable structure.
   离子化合物是在原子或离子结合形成稳定结构时形成的。
2. 2. The ionic bond is strong and permanent, making it difficult for the molecules to break apart.
   离子键强而持久，使得分子难以分解。
3. 3.In ionic crystals, the positive and negative ions are arranged in a regular pattern.
   在离子晶体中，正负离子按规律排列。