relative e atomic mass相对原子质量
relative atomic formula mass相对原子质量
The relative atomic mass相对原子质量
average relative atomic mass平均相对原子质量
N(名词) the ratio of the average mass per atom of the naturally occurring form of an element to one-twelfth the mass of an atom of carbon-12 原子量 ( symbol: abbr: r.a.m.Former name atomic weight)