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本文在分析共价氢化物Ｙ_ｍＡ－Ｈ分子中Ａ－Ｈ键伸缩力常数Ｋ_（Ａ－Ｈ）变化规律的基础上，经过理论证明，提出了一个新的计算Ｋ_（Ａ－Ｈ）的公式：，并用新方法计算了一些共价氢化物的Ｋ_（Ａ－Ｈ）值，结果与实验值相当一致，说明新公式是可靠的。
Based on the analysis of the change rule of A-H stretching force constant K_ (A-H) in the covalent hydride Y_mA-H molecule, a new K_ (A-H) formula is proposed theoretically. , And K_ (A-H) values of some covalent hydride were calculated by the new method. The results are in good agreement with the experimental data, which shows that the new formula is reliable.