1. 燃素，熱素原來(lái)假設(shè)的在所有燃燒物質(zhì)中揮發(fā)性的一種物質(zhì)成分，在燃燒中作為火焰而被釋放出來(lái)
   A hypothetical substance formerly thought to be a volatile constituent of all combustible substances released as flame in combustion.
2. 石腦油一種高度揮發(fā)性的易燃液態(tài)碳?xì)?a href="/hycd/h/h256174.htm" target="_blank">化合物混合物，從石油、煤焦油和天然氣中提煉出來(lái)，并用作石油、溶劑和制造各種化合物中
   Any of several highly volatile, flammable liquid mixtures of hydrocarbons distilled from petroleum, coal tar, and natural gas and used as fuel, as solvents, and in making various chemicals.
3. 石油類是石油當(dāng)中易揮發(fā)，易點(diǎn)燃的成分。通過(guò)蒸餾獲得，用作溶劑
   A volatile, flammable fraction of petroleum, obtained by distillation and used as a solvent.
4. 汽油容易揮發(fā)。
   Petrol is volatile.

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