长难句:by contrast, they saw in the preceding hundred years from 1650 to 1750, when england was still a completely agricultural country, a period of great abundance and prosperity.
结构剖析:本句的主干是they saw ... a period of great abundance and prosperity, 其中 they saw 后面的介词结构 in the preceding hundred years from 1650 to 1750 为状语,修饰 saw; when 引导的定语从句 修饰前面的 the preceding hundred years from 1650 to 1750。