polyaddition reaction

例句：

1. 1.The polyaddition reaction is a complex process that requires careful monitoring.
   多加成反应是一个复杂的过程，需要仔细监控。
2. 2.Polyaddition reactions are used in the synthesis of many organic compounds.
   多加成反应用于合成许多有机化合物。
3. 3. Polyaddition reactions have been studied extensively in recent years due to their potential applications in materials science.
   由于在材料科学中的潜在应用，近年来对多加成反应进行了广泛的研究。