prepolymer

例句：

1. 1. The prepolymer was used to make the polymer.
   预聚物被用来制作聚合物。
2. 2. The prepolymer is a precursor to the final product.
   预聚物是最终产品的一个前体。
3. 3.The prepolymer was mixed with the solvent before it was cured.
   预聚物在固化之前与溶剂混合。