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
They're coming by at six tomorrow morning,
他们明天早晨六点钟过来，
I'm twenty-two (years old).
我二十二了。
small at first, narrowly contained within its banks,
开始很小，被紧紧地夹在两岸中间，