求翻译：However, it’s often blamed for its obvious defects. First, exams are always over-stressed as the aim of both learning and teaching. Thus the exam system is often blamed for the formation of the traditional exam oriented education system. Second, exams are always associated with promotion to a higher grade of admittance to college. Therefore, they are heavily responsible for the present exam-assessment system. Finally, because the system leads to student’s heavy study load and it mainly produces students with high scores and poor abilities, it’s always the target of criticism and focus of reform.是什么意思？

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