【正确答案】 1、正确答案：Back translation is a process in which a text that has been translated into a given language is retranslated into the SL(source language). The procedure of back translation has been used for various purposes. It is sometimes used in contrastive linguistics as a technique for comparing specific syntactic, morphological or lexical features of two or more languages. An early use of the term in this context can be found in Spalatin.