lay a theoretical foundation 奠定理论基础
lays a theoretical foundation 奠定了理论基础
provided a theoretical foundation 提供了理论基础
a solid theoretical foundation 坚实的理论基础
lay a solid theoretical foundation 奠定了坚实的理论基础
This is a theoretical foundation of this text.
这是本文的理论基础。
These lay a theoretical foundation forinresearching listed companies' Earnings Management.
这为研究我国上市公司盈余管理打下了理论基础。
The established equation provides a theoretical foundation for the study and application of CO_2 arc welding.
文中所建的表达式，为CO_2电弧焊的研究和应用提供了理论依据。
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