| environ. | crude oil A comparatively volatile liquid bitumen composed principally of hydrocarbon, with traces of sulphur, nitrogen or oxygen compounds; can be removed from the earth in a liquid state | 原油 (一种具有较大挥发性的液态沥青，其基本组成是碳氢化合物，还含有少量的硫、氮和氧化物，可以在地下以液态的形式被移除。) |
