短語詞組短語relative isotopic abundance 同位素相對分布量;同位素相對豐度relative e abundance 元素豐度relative isotope abundance determination 相對同位素豐度測量Relative Factor Abundance 相對要素充裕度relative e abundance of methane 相對瓦斯涌出量relative abundance of species 物種相對多度relative e isotopic abundance 同位素相對豐度relative abundance rank 相對多度排列relative abundance of ions 離子相對豐度 返回 relative abundance