请问下大家下面那个with which的用法

问题描述:

请问下大家下面那个with which的用法
Over the last 40 years there has been a great increase not only in the number of agricultural pesticides in use but also in the care and sophistication with which they are used by farmers.
一直看不懂介词+which结构,那位得道高人来帮我指点下~

with which 引导的是定语从句 并且在定从中 作状语
也就是 with the care and sophistication they are used by farmers