呃.如果句子是下面这样,
i didn't understand what was that the painter hung it on the most prominent position.
翻译应该是我不清楚画家挂在最显眼位置的东东是个啥.
gifted pen (妙笔生花)
such a black stain (那么个黑墨渍)
大概是在描述那个painting.那通过逻辑,这句话大概可以翻译成:我不清楚这个很有才的画家挂在最显眼位置的那块黑墨渍是个啥
啊看完补充明白了.楼主这样读来试试看:i didn't understand,what gifted pen such a black stain was,that the painter hung it on the most prominent position