Combining theory with practice may not definitely avoid dogmatism and combining theory with reality cant verify the theoretical validity, either.

理论和实践相结合未必能避免教条主义，理论和实际相结合也不能验证理论的正确性。

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Our arm is to explore the physical mechanisms of the effects, and to supply physical models and make theoretical validity in designing novel quantum filtering devices with better properties.

本文利用散射矩阵和传输矩阵等方法研究了半导体异质结量子阱和一维光晶格体系中的量子输运特性，为设计和实现具有优良性能的量子过滤器件提供理论依据。

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It demonstrates the validity and the universal applicability of theoretical design.

证明了理论设计的有效性和普遍适用性。

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Although the arguments about access to drugs through parallel imports and compulsory-licensing agreements may have some theoretical validity, the disincentive to investment provided by such measures is massive.

ECONOMIST: Homeward bound?