6. to read between the lines:to interpret the hidden meaning or a hidden message; to discern the true fact (从字里行间体会隐含的意义;领会言外之意或能了解其中的真正意义)
As you look at this poem, be sure to read between the lines. (读这首诗的时候,要从字里行间去体会它的含义.)
After he re-read the love letter between the lines,he realized that he was dumped by his sweetheart. (重读情书之后,他终于明白他已经被情人抛弃了.)