Yǐxī zài cuīhuàjì de zuòyòng xià fāshēng jùhé fǎnyìng.
Ethylene undergoes polymerization under the action of a catalyst.
Tips
usage
聚合 is used across domains: in general contexts it means to gather or converge; in technology it means data aggregation; in chemistry it specifically means polymerization (the process of forming polymers like plastic).