Practical cosmologists would like to see direct evidence for the reionization epoch before adding the missing chapter to their textbooks .

讲究实际的宇宙学家，希望在为教科书增补遗漏的章节前，能先看到再游离的直接证据。

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Part one of the thesis is a contribution to the theoretical studies of the 21CMA project, one of NAOC's key project which aims at probing the epoch of reionization.

第一部分是对宇宙再电离时期的研究，这属于国家天文台重点项目21CMA的理论研究部分。

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Part one of the thesis is a contribution to the theoretical studies of the 21CMA project, one of NAOC's key project which aims at probing the epoch of reionization.

第一部分是对宇宙再电离时期的研究，这属于国家天文台重点项目21CMA的理论研究部分。

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