通常这些国家的机构体制非常脆弱。

Usually there are very weak institutions in many of these countries.

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期初余额不同的机构体制。

Opening balances vary from institution to institution.

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论文重点对中国科学社的基本情况进行探索，说明科学社在物理学研究机构体制化过程的重要作用。

Emphasis is laid on the function of the Science Society of China and its contribution to the institutionalization of physics scientific study in China.

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