polymerization in situ

例句：

1. 1. The polymerization of epoxy resin is a critical step in the manufacturing process.
   环氧树脂的聚合是制造过程中的一个关键步骤。
2. 2.Polymerization is a chemical reaction that occurs when a large number of small molecules combine to form a single large molecule.
   聚合是一种化学反应，当大量的小分子结合形成单一的大分子时会发生。
3. 3. During polymerization, the molecular weight of the polymer increases as the number of repeating units increases.
   在聚合过程中，随着重复单元的数量增加，聚合物的分子量会增加。