the new electric motorcycle is the newest variety we made,an

e of +抽象名词（value,importance,use,help,bravery,difference,patience,courage,ability等）,of表示“具有”,“具备”等意思；of不能省,这一结构相当于“be+该抽象名词相对应的形容词（形容词前用very,not作修饰语）”例如：
1.They are of great help / very helpful to learners of English.
他们对英语学习者来说是很有帮助的.
2.But in fact sports and games can be of great value / very valuable.
事实上体育运动是很有价值的.
3.The book is of no use / useless to us.
这书对我们无用.
4.It is of great importance / very important to study English.
学习英语很重要.
5.It’s of much possibility / very possible to misunderstand each other in life.
生活中人与人之间发生误会是很可能的.
6.Your idea is of no difference from mine.
= Your idea is not different from mine.
你我的想法一样.

就是表示具有high quality
be of 后面接一个属性，有这种用法
补充个参考吧：http://wenku.baidu.com/view/899bf0d528ea81c758f5781a.html