He described it as a very agreeable situation located within two small hills in the midst of which flowed a great river

问题描述:

He described it as a very agreeable situation located within two small hills in the midst of which flowed a great river 这句话应该要怎么理解呢
located within two small hills是指这个situation吗 但是in the midst of which里的which又是指hills,那这两段不就指的是同个地方了吗?求帮分析下
还有within和between的区别

He described it as a very agreeable situation located within two small hills in the midst of which flowed a great river这句话 located within two small hills in the midst of which flowed a great river ...