You can easily make this change in a migration because the migration has access to model objects and can make logical decisions based on the model's state.

用迁移可以容易地进行这个变化，因为迁移可以访问对象模型并根据模型的状态进行决策。

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We can adopt firm and logical decisions, thereby improving the prospects of a better life for current and future generations.

NPR: Transcript of Ahmadinejad's U.N. Speech

It turns out that the group with the inability to feel fear made the most logical decisions, choosing to participate in 84% of rounds.

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But on average, logical investment decisions will beat those based on the idea that recent experience will continue.

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