It studies these populations in the past, present and future using quantitative data and mathematical models as tools of analysis.

它使用定量数据和数学模型作为分析工具，研究这些人口在过去、现在和未来的情况。

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Granted, these studies were conducted using rats, and we have to acknowledge the metabolic differences of our rodent counterparts.

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These are curated using an algorithm: Twitter studies the accounts you follow and serves up similar stories.

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These two studies may raise the bar on companies that want to claim that their product, using technology to improve care, is truly effective.

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