英语比较句WhatIhadgainedbythisoutsideexperiencehasbeenofgreatervaluethanyearsoflaterinvestigationinmyfavoritegroups.译文：我从这次自己选修学科以外的经历中得到的收获,其价值超过以后我对自己

Question

英语比较句
What I had gained by this outside experience has been of greater value than years of later investigation in my favorite groups.
译文：我从这次自己选修学科以外的经历中得到的收获,其价值超过以后我对自己最喜欢的物种群所做的多年研究.
请问：of greater value 和 years of later investigation 这里语法上是怎么回事?比较句是怎么样的?

Answer 1

这是一个含有than的比较状语从句.than之前的部分为主句；than从句中省掉了What I gained from.
主句中又涵主语从句“What I had gained by this outside experience”；“has been”为系动词,“of greater value ”为表语.
“years of later investigation”与“by this outside experience ” 为比较的范围.