这一理论的局限性源于它只考虑了制约翻译策略选择的客观文化因素，而忽视了作为翻译主体的人的主观能动性。

The limitation of the theory results from the fact that it does not take into consideration the initiative of the translators with regard to the selection of translation strategy.

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因此，对该区进行植被恢复研究，不仅可以阐明制约植被恢复的关键因素，而且对植被生态系统的恢复重建提供理论依据。

So vegetation restoration research not only can illuminate the key restraint factor of vegetation recover, but can give the theoretic supports to the vegetation eco-system's reconstruction.

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第二部分，在一般系统结构理论的指导下，分别从企业系统结构和企业系统环境两个方面对现阶段我国私营企业二次创业的制约因素进行了分析。

Part two: Directed by The Structural Theory of General Systems, this part analyzes the restricting factors from two aspects of the structure and environment of enterprise system.

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