Μετάφραση - Αραβικά-Αγγλικά - لتي يمكن أن تستعملها إذا أردت خلف

This is a sentence fragment. It looks as though the first word is supposed to be "allati" ("which"/"that"), but it is missing the initial letter. The word خلف might also be translated as "spare" or "alternate."