these member banks buy stock from their regional Federal Banks is the body of Fed system which接补充determines the interest rates of the USA.这句话怎么有俩动词,buy和is,这是怎么回事啊?

these member banks buy stock from their regional Federal Banks is the body of Fed system which接补充
determines the interest rates of the USA.这句话怎么有俩动词,buy和is,这是怎么回事啊?

这个句子是错的,不通
原句就是这样吗?