Something that the background and significance of this study on the theory of revenue management is mainly expound in the first chapter.

其中第一章主要对研究背景、研究意义和有关收益管理的理论做了阐述。

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The study on the theory of res judicata in our country, especially in the subjective scope of res judicata is not thorough because of various reasons.

而我国对既判力理论，尤其是既判力主观范围的研究由于种种原因并不深入。

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But the study on the theory of Maxwell fisheye microspheric lens shows that on certain condition it has fine image formation ability and coupling efficiency.

但通过对麦克斯韦鱼眼微球透镜的理论研究表明，在一定条件下，它具有良好的成像性能和耦合效率。

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Bekenstein (who collaborated with Stephen Hawking on his groundbreaking study of black holes in the 1970s) suggested that there might be more to the theory:We might be 2-D creatures whose minds have given us the illusion of three dimensions to help us get around.

FORBES: Flatland?

That theory is based on a study of almost 4, 000 people, half of whom had the disease.

BBC: Clue to old age memory loss