考研的英文表达有以下几种：
graduate student entrance examination
Unified National Graduate Entrance Examination
Postgraduate Entrance Examination English或简称 PGEE
take part in the postgraduate entrance exams
建议根据具体语境选择合适的表达方式。例如，在正式文件或学术场合中，使用“graduate student entrance examination”或“Unified National Graduate Entrance Examination”会更加准确和专业。在日常交流中，可以简化为“Postgraduate Entrance Examination”或简称“PGEE”。