及物动词使纯化; 使稀薄; （思想等）精炼; 使变得精妙深奥

及物动词condense

1. 稀释;使稀薄,抽空：rarefaction 稀薄[化] | rarefy 稀释;使稀薄,抽空 | rare metal 稀有金属

2. 稀薄：rarefied 纯净的 | rarefy 稀薄 | rarely 很少地

3. 使稀少：falsify 伪造 | rarefy 使稀少 | citify 使都市化

4. 使纯化：rarefactionrarenessraritysubtilizationsubtiltytenuitywashiness 稀薄 | rarefy 使纯化 | rarefy 使稀少

verb

1. weaken the consistency of (a chemical substance)

Synonym: attenuate

2. make more subtle or refined

Synonym: sublimatesubtilize

3. lessen the density or solidity of

e.g. The bones are rarefied