| 字词 | 稀薄 |
| 释义 | 稀薄 形(of air or smog, etc) thin; rare 稀薄气体rarefied/rare gas; low density gas 高海拔地区空气稀薄。The air is rare at high altitudes. 山里空气稀薄，呼吸困难。It is hard to breathe in the rarefied air of the mountains. 越往上爬，空气越稀薄。The higher we climbed, the thinner the air became. 稀薄燃烧 名lean burn |
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