The hit ratios for data and index pages reflect the number of times a page request was handled by the buffer pool directly without requiring disk I/O.

数据和索引页面的击中率反映了缓冲池在不需要磁盘 I/O 的情况下直接处理一个页面请求的时间量。

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Then an approach was put forward to evaluate the potential risk of thermal runaway in exothermic reaction system by use of system safety index, and the equilibrium region o.

提出用系统安全指数概念来评价放热反应系统发生热爆炸的潜在危险性，分析化学放热系统的平衡域。

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The author then proposes to develop an index of heterogeneity in time, perhaps in the following manner: Habitat, applying the numbers-1 of forest, o for meadow or savanna.

然后作者又提出求异质性在时间上的指数，这多半采用以下方法：生境：森林为—1，草甸或稀树草原为O。

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