In theory, this is the moment when Putin should finally step down after a quarter of century at the apex of Russian power.

理论上，现在是普金离开他占据了四分之一个世纪的俄罗斯权力核心的时候了。

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This paper discussed the theory of APEX method, and put forward the improved method for the deficiency of adaptability and stability of APEX.

论述了A - PEX算法的原理，并针对APEX在适应性和稳定性方面的不足提出了改进方法。

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Till now, "Hubert Apex" theory is far from obsolete, as the threat of exhaustion of global energy resources has always perplexed human society.

今天“休伯特顶点”理论并未过时，全球石油能源枯竭的威胁始终困扰着人类社会。

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