monomolecular reaction

例句：

1. 1. The monomer is the building blockof proteins.
   单体是蛋白质的构建块。
2. 2. Themonomer can be used to make polymers.
   单体可以用来制造聚合物。
3. 3. The monomer reacts with waterto form a new compound.
   单体与水反应形成新的化合物。