They were nearly all composed during the same twenty-five years of his mathematical studies. They fall into several groups.

它们分几个部分，几乎都是在与他的数学研究相同的25年期间完成写作的。

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Archimedes spent his life in philosophical and mathematical studies. To the Greeks of his day, manual labor was degrading, and they looked down upon experimentation with distaste.

阿基米德毕生从事哲学和数学研究。对于他那个时代的希腊人来说，体力劳动是丢人的，他们厌恶和看不起实验工作。

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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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Alex Wissner-Gross of Harvard University and the Massachusetts Institute of Technology in the US and Cameron Freer from the University of Hawaii at Manoa, have now put together a mathematical model that ties this causal entropy idea - evident in a range of recent studies - into a single framework.

BBC: Entropy law linked to intelligence, say researchers

The studies together indicate that math ability is inborn in many species, with number sense, mathematical skills and verbal ability perhaps being separate talents in humans that we later learn to combine.

MSN: Dolphins appear to do nonlinear mathematics