1.lessen the density or solidity of;
The bones are rarefied
2.make more subtle or refined
3.weaken the consistency of (a chemical substance)
1 . 稀薄
...efaction(同義：提純→純化/ 使稀薄→稀薄)反義詞：condensatio n(濃縮)(記) rarefy（使稀薄）+ac tion
2 . 使稀薄
rare adj. 稀有的 scarce, uncommon, infrequentrarefyvt. 使稀少，使稀薄rarely adv. 很少地，罕有地 seldom, hardly ever.
3 . 抽空
rarefaction 稀薄[化]rarefy稀釋；使稀薄，抽空rare metal 稀有金屬
4 . 使稀少
1 . 稀薄空氣
rarefaction wave 余波rarefied air 稀薄空氣rarefied gas 稀薄氣體
2 . 稀薄的空氣
the rarefied air of the mountain tops ., 山頂上稀薄的空氣.
1 . 稀薄流
不可壓縮流(incompressible flow) 可壓縮流(compressible flow) 稀薄流(rarefied flow) 多相流(multiphase flows) 壁層(殼邊界層)(wall layers(incl boundary.
1 . 稀薄區(qū)
晶體學(xué)英語詞匯翻譯 ... 稀薄氣體 rarefied gas 稀薄區(qū)rarefied zone 稀薄電漿 rarified plasma.
1 . 摻稀土晶體
摻稀土氟化鈣rare-earth-doped crystal摻稀土晶體rarefied gas稀薄氣體raster
美[?r?r??fa?] 
