自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
ADJ 职业的；专业的 Professional means relating to a person's work, especially work that requires special training.
His professional career started at Liverpool University.
ADJ （人）职业的，专业的 Professional people have jobs that require advanced education or training.
...highly qualified professional people like doctors and engineers.
ADJ 专门从事的；非业余的 You use professional to describe people who do a particular thing to earn money rather than as a hobby.
This has been my worst time for injuries since I started as a professional footballer...
Jack Nicklaus has played in every Major Championship since he turned professional in 1961.
ADJ （运动）职业性质的 Professional sports are played for money rather than as a hobby.
...an art student who had played professional football for a short time.
ADJ-GRADED 专业的；内行的；高水平的 If you say that something that someone does or produces is professional, you approve of it because you think that it is of a very high standard.
They run it with a truly professional but personal touch.