钐同位素丰度
absolute isotopic abundance of samarium
生物丰度指数
biological abundance index
示踪元素丰度
Abundance of trace element
铅同位素丰度比
lead isotope abundance ratio
Lead isotope ratio
水系沉积物元素丰度
Water system deposit element adundance
天然丰度N-磷酰化氨基酸
natural abundance N-phosphoryl amino acids
同位素的相对丰度
abundance ratio of isotopes
同位素丰度
isotope abundance
isotopic abundance
abundance of isotopes
absolute isotopic abundance
isotopic abundance ratio
fractional isotope abundance
isotope
Isotopic composition
abundance
isotope ratio
isotope aboundance
isotojpic abundance