感恩节的来历英文版50字内容如下：
感恩节起源于美国，为了纪念一年前发现美洲新大陆的庆祝活动。在第一个感恩节的这一天，印第安人感谢上帝赐予他们丰收，并邀请英国移民一起来庆祝节日。从此，这种感恩的传统便延续下来，成为一年一度的感恩节。
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The origin of Thanksgiving can be traced back to the 1621 celebration by the Pilgrims after a successful harvest. This festival of giving thanks and feasting has since become an annual tradition in the United States, emphasizing gratitude and community.
