请将下面这段话翻译成英文:  研究生考试  研究生考试是全国研究生招生考试的简称,俗称“考研”,一般要求参加考试者具备大专以上学历,通过考试入学后,进行全日制学习,完成学分并通过论文答辩等要求后,即可获得国家认可的学历证书和硕士学位证书。考试内容分为基础科目和专业科目两大类,考试时间一般在每年的一月份。  参考译文  Postgraduate Examination  The Postgraduate Examination, short for National Postgraduate Admission Examination, commonly called “Kaoyan”, requires test takers to have obtained academic qualifications from undergraduate programs or higher levels. Those who pass the examination and are enrolled into relevant universities need to go through full-time studies to claim academic credits and need to successfully defend their dissertations before being awarded nationally recognized graduation certificates and postgraduate degree certificates. The examination comprises of foundational subjects and specialized subjects, and is usually held in January every year.