离题万里 meaning in English

be remote from the subject; be too far afield; be too far from the subject [mark]; completely off the point; go adrift far from the subject; go wide of the mark; it hit a long way from the target.; miles away from the subject; there is a far cry to the subject.; 下笔千言，离题万里 a thousand words from the pen in a stream, but ten thousand li away from the subject