在一万五千多年前进行第一次迁移的是古印度人，他们是美洲中部和南部的印第安人的祖先。
The first, Paleo-Indian, wave more than 15,000 years ago was ancestral to all Central and South American Indians.
有很多古人(古印度人)不仅努力理解无限，还认为给无限大和无限小的不同分类定义很重要。
Here's a group of ancient people (ancient Indians) trying not only to comprehend the infinite but somehow thought it important to name so many divisions of infinitely large and small.
古希腊人泰勒斯在说水是万物的本原、邹衍在创立五行学说、古印度人在提出四要素说时其知识均来源于人的生活实践；
It is based on the practical life of human to create the water of origin from ancient Greece Thales, Five Elements from Zou Yan and Four Elements from ancient Indian;
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