| 单词 | photodegrading | 
| 释义 | > as lemmasˌphotodeˈgrading   ˌphotodeˈgrading  n. photodegradation. ΚΠ 1974    Daily Colonist 		(Victoria, Brit. Columbia)	 29 June 7/1  				All that's needed is a little sunlight to get the process going (photodegrading). 1991    Western Living June 58b/2  				Similar to the white PVC of plumbing pipes, the plastic resin used for this furniture is chemically altered to resist photodegrading and yellowing. < as lemmas | 
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