Rarefying
v. 使稀薄( rarefy的现在分词 ); （思想等）精炼; 使纯化; 使变得精妙深奥
✅ 同义词
🗣️ 情景例句
Yes, but I also want to apply to several other colleges.
是的 ，但我还想申请几所其他的大学。
This offer is firm subject to your acceptance reaching us not later than December 15.
此报盘为实盘，但以我方在12月15日前收到你方答复为准。
They said that the march had been forbidden, but that wasn't true.
他们说游行向来是被禁止的，但这不是事实。