The custom of choosing a sweetheart on this date spread through Europe in the Middle Ages, and then to the early American colonies.

中世纪时，在这个日子里选择意中人的习俗传遍了欧洲，然后又传到了早期的美洲殖民地。

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Middle of the 18th century, the British colonies in the Americas and the United Kingdom have a rift.

18世纪中叶，英国在美洲的殖民地与英国之间已有了裂痕。

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Middle eof the 18th century, the British colonies in the Americas and the United Kingdom have a rift.

18世纪中叶，英国在美洲的殖民地与英国之间已有了裂痕。

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The main method that the thesis had taken is to divide geographically the thirteen colonies of North America into three districts, i. e. New England, the middle and the south areas.

本文的具体研究方法采用了按照地域把北美十三个殖民地分为三个地区——新英格兰地区、中部和南部地区的研究方法。

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The main method that the thesis had taken is to divide geographically the thirteen colonies of North America into three districts, i. e. New England, the middle and the south areas.

本文的具体研究方法采用了按照地域把北美十三个殖民地分为三个地区——新英格兰地区、中部和南部地区的研究方法。

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