1. The chemist was polymerizing monomers to create a new type of plastic.
化学家正在聚合单体，以创造一种新型塑料。

2. The process of polymerizing ethylene creates polyethylene, which is a common plastic used for packaging.
聚合乙烯的过程可以制造聚乙烯，这是一种常用的用于包装的塑料。