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

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.

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

晶體學英語詞匯翻譯 ... 稀薄氣體 rarefied gas 稀薄區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