帮忙分析下句子成分并翻译
问题描述：
帮忙分析下句子成分并翻译
This is particularly very useful in well with a narrow mud weight window in which a slight increase or decrease in ECD/ESD may result in losses or gains.
ECD/ESD（equivalent circulating density/equivalent static density）：当量循环密度/当量静态密度
答
主句 This is particularly very useful in well with a narrow mud weight window 主语：This谓语动词：is表语：particularly very useful 特别有用处所状语：in well 在竖井里修饰 well 的：with a nar...