1. 使气体变稀薄：rarerrarest 稀罕的 | rarify 使气体变稀薄 | rarify 使成精细

2. 使成精细：rarerrarest 稀罕的 | rarify 使气体变稀薄 | rarify 使成精细

verb

1. make more complex, intricate, or richer

e.g. refine a design or pattern

Synonym: complicaterefineelaborate