The student with the second highest academic rank in a class who delivers the salutatory at graduation exercises.
班里学业成绩列第二的学生，在毕业典礼上致开幕词.
英语百科
List of academic ranks
This list of academic ranks identifies the hierarchical ranking structure found amongst scholars in academia. The lists below refer specifically to colleges and universities throughout the world, although other institutions of higher learning may follow a similar schema.