知识贝壳
知识贝壳
所属栏目：世界英汉杂辑
Derived units are formed by combining base units. Velocity forexample (distance divided by time) has units of metres per second(ms-1 or m/s). Certain units have their own special names andsymbols as shown.导出单位是通过基本单位的组合而形成的。例如速度(距离除以时间)的单位 ......（本文共 714 字 ） [阅读本文] >>