| 单词 | rock oil |
| 释义 | rock oil in British Englishnoun another name for petroleum rock oil in American English Chiefly British petroleum rock oil in American Englishnoun petroleum Word origin [1660–70; trans. of ML petroleum]This word is first recorded in the period 1660–70. Other words that entered Englishat around the same time include: aspirate, ballet, mainstream, saturated, sketch |
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