1，the residual income model is conceptually sound and hence will have a clear relationship to other sound models such as dividend discound model。请问一下，这句话怎么翻译？尤其是句中的“sound”？？
2，two measures of stock“s overvaluation：the relative M/B method and the regression method。请问下，“the relative M/B method ”怎么翻译？？
谢谢，不胜感激