许多金融事件和其他有先后顺序的事件既需要存储日期，又需要存储每天的时间；比如记录购买完成的时间。

Many financial and other sequencing events require you to store both the date and time of day; such as recording when a purchase was completed.

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我们将按照历史上的先后顺序研究这些事件。

We will deal with events in historical sequence.

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时间序列关系推理是对事件发生的先后顺序关系的推理，是日常生活思维的重要方面。

Reasoning about temporal relations, a very important aspect in daily life, can be defined as reasoning about the event sequences.

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