这是因为个子小的优势。

That's the advantage of being fairly small.

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但具体到一个物种内部，则会出现相反的规律：个子小的老鼠比大老鼠活的更久。

Within species, an inverse relationship sometimes takes hold: Smaller rats live longer than big ones.

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例如，您可以将一个大表分成十个小的子表，每个子表包括十年中的一年的数据和业务流程规则。

For example, you can divide a large table into ten smaller, children tables that contain data and business process rules for each of the ten years.

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