同时，他注意到，提高教师素质的教育支出能得到比其本身多很多倍的回报，因为能达到相关性较少的很多方面。
And, he notes, education spending that improves teacher quality pays for itself many times over because it achieves so much for so relatively little.
的确，奈特博士和托珀利特博士的研究发现，生殖成就与男性的收入呈正相关，同时也指出，对女性而言，这种相关性是反向的。
Indeed, the study by Dr Nettle and Dr Pollet which found that reproductive success correlates with men's income, also points out that with women the correlation is inverted.
由于同时与服务提供者和服务使用者具有业务和技术相关性，服务版本管理模型的关键是服务规范。
Because of its business and technical relevance to both service provider and service consumer, the lynchpin of the service versioning model is the service specification.
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