GRE is the abbreviation of Postgraduate Achievement Examination, which means Postgraduate Entrance Examination. It is one of the necessary examinations for graduate students in American universities. Unlike TOEFL, IELTS and other English tests, GRE mainly tests students' performance in mathematics and language ability. GRE is divided into ordinary GRE and subject GRE, which are used for postgraduate and doctoral entrance examinations respectively. General GRE includes mathematics and language, and subject GRE includes 22 subjects.

GRE mathematics part, the basic knowledge of high school mathematics and college mathematics, including algebra, geometry, trigonometric function, calculus and so on. , mainly for inspection, which is quite difficult. In the GRE language part, in addition to vocabulary, candidates' reading comprehension, logical reasoning, discourse analysis and other abilities will be tested. Because GRE has a great influence on graduate enrollment in the United States, candidates need to prepare for the exam carefully to ensure that they can apply for the ideal school and major.

GRE score is usually one of the important bases for applying for graduate students and doctoral students, which can be said to be a "stepping stone" for applying for American universities. When applying, students should submit their transcripts to the examination center. Most universities require GRE scores to reach a certain standard before considering accepting applicants. In addition, GRE scores can also be used to show competitiveness and apply for scholarships. Therefore, candidates need to take it seriously, do more exercises and mock exams, and respond flexibly to exam questions in order to get the highest score.