YTM到期收益(率) Yield To Maturity 的缩写Ytn.[化]钇yttrium fluoride氟化钇yttrium chloride氯化钇yttrium phosphate磷酸钇yttrium carbonate碳酸钇ytterbium acetate乙酸镱ytterbium bromide溴化镱yttrium tantalate钽酸钇ytterbium carbide碳化镱yttrium aluminate铝酸钇ytterbium complex镱络合物