例句與造句

1. There are two parts in this article . part i is mainly discussing an elementary problem in kac - moody algebra : how to describe the real and imaginary root vectors corresponding to a given real or imaginary root
   本文分為兩個相對獨立的篇章：第一部分主要討論了kac - moody代數(shù)中的一類基本問題，即給定一個實根或虛根，其對應的實根向量和虛根向量該如何表示
2. It's difficult to find root vector in a sentence. 用root vector造句挺難的