找一句英语定语从句
问题描述：
找一句英语定语从句
要求复杂一点,难一些,有讲解和分析以及准确的翻译
答
The concept that one could prove theorems of angles and lines that were in no way obvious made an "indescribable impression" on the young student.原来人可以证明那些不易明显看出的角度和线段的定理——这...