Many species appear to remain unchanged in the fossil record for millions of years—a situation that seems to be at odds with Darwin's model of continuous change.

许多物种似乎在数百万年的化石记录中都保持不变——而这种情况似乎与达尔文的持续变化模型不一致。

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The second loop iterates through all relationships in the Active Record model and renders the appropriate partial for each relationship.

第二个循环在活动目录模型中的所有关系上迭代，并呈现每个关系的适当部分。

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The framework queries two sources of metadata: the Active Record model and a custom metadata file for each model object.

框架查询两个元数据源：活动记录模型和每个模型对象的定制元数据文件。

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He's also a successful musician in his own right, who recently opted to eschew the traditional record label model for the release of his two new Kickstarter-backed albums.

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Luckily for the movie world, the new model has a proven track record of success.

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Also notable was the same multi-dialed Zenith model worn by Felix Baumgartner on his record-setting space dive.

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