~(15)N的同位素稀释法
15)N isotopic pool dilution
~(15)N同位素稀释法
15N isotope dilution method
symbioticdinitrogenfixation
~(39)Ar~-~(40)Ar同位素年龄
39)Ar~-~(40)Ar isotopic age
14C同位素示踪
14C-isotope trace technique
14 C tracer
15N的同位素稀释法
15N isotopic pool dilution
15N同位素示踪技术
Labeled 15N isotope technique