polybase

例句：

1. 1. Polymers are used in many industries to make materials that are strong and durable.
   聚合物被用于许多行业，用于制造强度高且耐用的材料。
2. 2.The polycondensation process involves the formation of large molecules from smaller ones.
   缩聚过程涉及从较小分子形成较大分子的过程。
3. 3. Polymers are also used as adhesives, sealants, and coatings for various applications.
   聚合物也被用作各种应用中的粘合剂、密封剂和涂层。