“primary standard of length”的概念、定义、翻译、参考文献-科学参考

单词	primary standard of length
释义	primary standard of length Encyclopedia 工学米定义释 primary standard of length长度计量基准以现代科学技术所能达到的最高准确度保存和复现长度单位“米”的整套装备。
随便看	balloon-borne IR telescope balloon-borne photometer balloon-borne spectroscope balloon-borne telescope balloon-borne UV telescope balloon-borne X-ray telescope balloon-borne γ-ray telescope balloon dilatation balloon explosion balloon flower ballooning instability ballooning mode balloon logging balloon movement Balloon Observations of Millimetric Extragalactic Radiation and Geophysics telescope balloon photography balloon platform balloon satellite balloon telescope balloon theodolite ballot problem ball pair ball picking ball point picking ball screw

科学参考收录了854744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。