Her letter seemed pretty cheerful, but if you read between the lines, you can tell that she's not really happy.从她的来信看，似乎她相当开心，但从字里行间你可以看出她并不是真的快乐。Some kinds of poetry make you read between the lines.有些诗要你从字里行间去体会其含意。The English translation is inserted between the lines of text.英语译文插在原文字里行间。The teacher wrote in corrections between the sentences on the paper.教师在卷子的字里行间作批改。