关于not least
问题描述：
关于not least
请教关于此句中not least 的用法：To such motives,yet another must be added.The contemporary phenomenon of car worship is to be explained not least by the sense of independence and freedom that ownership entails.To this pleasure camping gives an exquisite refinement.
此句中not least 它在句中是什么作用?作什么句子成份呢?
答
不仅仅 句中作为连词 与and联用 表示两个原因