The Berry phase of the system are also discussed after an evolution period.

讨论了该系统在完成一个演化周期后的几何相。

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The evolution period of the farmer income policy affect the variety of the main factor of the farmer income.

分析结果：①农民收入政策的演进影响农民收入的主要因素的变化；

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Second, China is in economic growth and syructural evolution period, increasement and efficiency from syructural evolution is becoming common sence.

第二，中国正处于经济增长和结构变动期，从结构变动升级中求效益、求增长已成为共识。

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The finance industry is in the midst of a transformative period of evolution, and financial economists have a huge agenda to tackle.

ECONOMIST: Financial economics

"Every period shows evolution in their expression, " Rainero says.

WSJ: The Sublime Cats of Cartier

Dr Hazen and his team speculate from meteorite and early rock studies that several hundred mineral species, including zircon, quartz, clay and halite salt crystals, formed during this early period of mineral evolution.

ECONOMIST: Minerals