This paper was a stage result of the Humanities and Social Science Fund Project of University of Shanghai for Science and Technology in 2012 (Study on the "Translators' Trace" in the Cooperative Translation Mode based on Language Database — A Diachronic Interpretation on the Translation Texts of Yan Xianyi and Gladys Tayler (No.12XSZ05)),the Humanities and Social Science Research Project of the Ministry of Education (External Propaganda and Translation — Study on the External-propaganda Translation from a Diachronic Perspective (No.11YJC740047)),and the Key Course of Shanghai (Written English Translation for Science and Technology (No.1F11305003)),respectively. （Study on the "Translators' Trace" in the Cooperative Translation Mode based on Language Database — A Diachronic Interpretation on the Translation Texts of Yan Xianyi and Gladys Tayler (No.12XSZ05）