Napier's bones
美
英
- 网络纳皮尔算筹；纳皮尔骨头；纳皮尔的骨头
np. | 1. a set of graduated rods based on the principles of logarithms, formerly used to perform multiplication and division but now used primarily for educational purposes |
英汉词典包含292483条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。