气温变化周期是根据氧同位素测定的大量远古温度记录而推演出来的。 气温变化周期与人类演化进程的对照，暗示“黄金时期”与气候急剧波动而短暂的时期相对应。

What marked out this period was a greater range of recorded temperatures, suggesting it was a time of rapid but short-lived fluctuations in climate.

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本文着重探讨其变质作用类型，计算主要影响因素的变质温度， 模拟其变质演化过程。

The paper emphatically probe into metamorphism type, and counted the metamorphic temperature as main influence factor a nd simulated the evolutionary process of metamorphism.

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定量分析了整个轧制过程环件内的温度、等效应变、双向轧制力的分布和演化情况。

Distribution of temperature, equivalent plastic strain and radial and axial rolling force have been quantitatively analyzed in the whole process.

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