In the whole teaching system for English majors, English for Science and Technology (EST) as a subject, plays an important role of helping English majors to broaden their knowledge and horizon, to master the methods and thinking mode of scientific research, and to improve their comprehensive ability on the basis of strengthen their English language communicative ability. Of all the components, textbooks are the carrier as well as the fundamental guarantee of success of EST teaching. With the

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... ailed analysis of status of EST textbooks for English majors, including types and some existent problems, and with the probe into teaching objectives and teaching content of EST for English majors, this paper tends to propose some design principles and standards of evaluation for EST textbooks for EST researchers, in hope of improving the quality of EST textbooks for English majors so as to realize the all-sided improvements of EST textbooks, students, teachers, and the discipline itself.