| 单词 | petroleum |
| 释义 | petroleum —petroleous, adj. /peuh troh"lee euhm/, n. an oily, thick, flammable, usually dark-colored liquid that is a form of bitumen or a mixture of various hydrocarbons, occurring naturally in various parts of the world and commonly obtained by drilling: used in a natural or refined state as fuel, or separated by distillation into gasoline, naphtha, benzene, kerosene, paraffin, etc. [1520-30; < ML: lit., rock oil, equiv. to L petr(a) rock ( < Gk pétra) + oleum OIL] |
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