The speed of light in free space is one of the fundamental constants of nature . 真空中光的速率是自然界的基本常数之一。
Determination of some basic constants of ca 仲壬基苯氧基乙酸基本常数的测定
Units and fundamental constants in physics and chemistry 物理学和化学中的单位和基本常数
Overview of the general status and the capabilities of electrical metrology to illustrate the breadth of electrical metrology subject area and the relationship with fundamental constants 概括介绍目前电学计量的基本状况和能力,说明电学计量的主题领域范围、与基本常数的关系。
This paper discusses how to scientifically employ a geocentric 3d coordinate system in china and analyzes three main scientific problems involved in this regards , i . e . the definition of the system , the geodetic fundamental constants and tidal correction 摘要讨论了我国科学地采用地心三维大地坐标系,主要涉及到的该坐标系的定义、采用的大地测量基本常数以及与此有关的潮汐改正等三个问题。