求翻译：thanksgiving has hardly changed at all since 1621 in its intention and manner of celebration . thanksgiving is a family holiday , for it is customary for all members of the family to gather at the home of the father and mother. all over the country , husbands and wives ,sons and daughters, grandchildren and great-grandchildren travel from city to town, from town to village ,or from village to from to spend the day at old homes. mang speak to their parents or grandchildren by long distance telephone.是什么意思？

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