虚质量，虚质量的问题出现在超光速方面，由爱因斯坦的质速关系式m=m0/√[1-（v^2/c^2）]，可得当粒子速度超过光速时，质量就变成了虚数。
进而应用瑞利方法得到了薄板水中振动频率与真空中振动频率、无量纲附加虚质量增量之间的关系。
Then the relationship among vibration frequency of the plate in water and that in vacuo and the Nondimensionalized Added Virtual Mass Incremental (NAVMI) is obtain by utilizing Rayleigh method.
虚证患者的生活质量低于实证患者。
Deficiency syndrome had lower life quality than excess syndrome did.
结论口服健膝汤配合外敷中药治疗膝骨性关节炎脾肾两虚湿注骨节证能减轻疼痛，缓解症状，改善膝关节功能，提高患者生活质量。
Conclusion Jianxi decoction orally combining external therapy is very effective for KOA to relieve the degree of joint pain, allaying TCM symptoms and improve the life quality of the patients.
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