英文原文
Thanksgiving

Thanksgiving was first celebrated in 1621,when Plymouth governor William Bradford invited neighboring Native Americans1) to join the Pilgrims2) for a three－day festival in gratitude for the successful harvest that followed a hard winter.

The feast they sat down to3) had very little in common with today's celebration,however.It is quite likely that their feast consisted of fish,venison4),corn and other vegetables.Today's traditional dinner of turkey,mashed5) potatoes,green bean casserole6),cranberry7) sauce8) and pumpkin9) pie is mainly the result of a strong advertising campaign by turkey producers.

Thanksgiving was proclaimed a national holiday by President Abraham Lincoln in 1863.Many Americans consider this to be only an American holiday although it is also celebrated in Canada and harvest festivals are held throughout the world.
参考翻译
感恩节

感恩节始于1621年。那年，普利茅斯总督威廉·布雷德福邀请邻近的印第安人与早期的移民一起欢庆３天，共同庆祝在经过了一个艰难的冬天之后取得的丰收。

那时他们享用的盛宴和现在的活动却少有共同之处。他们当时的宴会可能有鱼、鹿肉、玉米和其他的蔬菜。如今传统晚餐上的火鸡、土豆泥、豆角焙盘菜、越桔酱和南瓜饼这些东西主要是火鸡生产商们大做广告的结果。

1863年亚伯拉罕·林肯总统宣布感恩节为全国假日。许多美国人都认为这是美国独有的节日。其实加拿大也庆祝它，许多其他国家也都有自己的丰收节。

注释
NOTE 注释：

Native American 印第安人

The Pilgrims = Pilgrim Fathers 清教徒前辈移民（指1620年到达北美洲创立普里茅斯殖民地的一批英国清教徒）

sit down to （使）坐下来从事

venison n. 鹿肉

mash vt. 捣碎

casserole n. 焙盘菜

cranberry n. [植]酸果蔓的果实

Sauce n. 沙司, 酱油, 调味料

pumpkin n. 南瓜，倭瓜