An interlinear Bible is one which gives you the translated English text in parallel with the relevant original Greek or Hebrew text of the scripture. It is a great resource if you are curious EXACTLY what a specific word or phrase meant when the original writer put it down. These tend to be expensive, but now you can find free tools to do the same thing online! If you're interested to see the language the original writers were working in, it is worth clicking through and trying it out.