结合相对论和量子理论，提出一种量子引力的理论，它的动机之一是出于美学上的对统一各种自然作用力的渴望。
Part of the motivation behind the quest to marry relativity and quantum theory - to produce a theory of quantum gravity - is an aesthetic desire to unite all the forces of nature.
解释期望理论与他们的作用在动机上的三个关键联系。
Explain the three key linkages in expectancy theory and their role in motivation.
在此基础上，通过分析会计数据对各契约成本的牵制作用，为管理层利用债务重组准则进行盈余管理的动机提供了理论依据。
On this foundation, this paper supplies theory base for the managers' using debt restructuring rules to carry out earnings management by analyzing the effect of accounting data on bargaining costs.
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