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. 他的职业生涯是从利物浦大学开始的。
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. 像医生和工程师这样需要高技能的专业人员
Professional is also a noun.
My father wanted me to become a professional and have more stability. 我父亲想让我成为职业人士,这样能更稳定一些。
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... 这是我当职业足球运动员以来受伤来得最不是时候的一次。
Jack Nicklaus has played in every Major Championship since he turned professional in 1961. 杰克·尼克劳斯自从1961年转为职业选手以来参加了四大赛的所有比赛。
Professional is also a noun.
He had been a professional since March 1985. 他从1985年3月开始就成了职业选手。
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. 踢过短时间职业足球的艺术系学生
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. 他们的经营既有真正的专业水准又不乏个人特色。
Professional is also a noun.
...a dedicated professional who worked harmoniously with the cast and crew. 一位非常敬业的、同所有演职人员合作融洽的专业人士