| 单词 | rule of thumb |
| 释义 | rule of thumb A rule, or guideline, based on experience and sound judgement rather than scientific knowledge.The origin of the term is vague, but some suggest that it originated in the practice of carpen-ters, seamstresses, artists, and other craftsmen of using their thumb to approximate measurements.The fact that the measurement of an inch is based on the distance between the thumbnail and the first joint certainly lends credence to this theory. 74570c18.qxd 9/12/07 12:39 AM Page 424 |
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科学参考收录了5291条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。