He still has a semester to go, and I tease him that at age 54 he has become a professionalstudent.
还差一个学期他就毕业，我取笑他在54岁时当上了职业大学生。
2
Professionalstudent refers to a person who receives multiple degrees and keeps taking courses instead of holding a profession related to the degrees earned.
“专业学生”指的是那种已经拿到好几个学位，依然继续进修深造，而不是去从事和既得学位有关的职业的人。
3
Many universities have standardized on Maple for teaching mathematical concepts; the company offers student and professional versions of the software.