of单独出现是什么用法

问题描述

She stood there motionless, her eyes filled with tears—whether of shame, frustration, or grief it was difficult to tell.  

请问老师句中的of是什么成分，什么意思？此句中的 of 是否是省略后的结构？

老师答疑

陈老师：

She stood there motionless, her eyes filled with tears—whether of shame, frustration, or grief it was difficult to tell.  

参考译文:她一动不动地站在那儿，眼睛里充满泪水是否羞愧，沮丧或悲伤，很难辨别。

请问老师句中的of是什么成分，什么意思？此句中的 of 是否是省略后的结构？

whether (they were the tears 省略 )of shame, frustration or grief , it was difficult to tell