专业的：professional有几种用法

英语自学网

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        I don't work like that. It's not professional...There is rules.
        ——Leon
        是我就不会那么做，那不专业，这行是有游戏规则的。
        ——《这个杀手不太冷》
        一、关于professional，你应该知道的用法有
        adj.
        1.职业（上）的；从事特定专业的 connected with a job that needs special training or skill, especially six that needs a high level of education
        A lawyer is a professional man.
        律师是从事专门职业的人。
         
        2.职业性的，非业余性的 having a job which needs special training and a high level of education
        This professional opinion may add the users' credence to the financial statements of the business.
        这些职业性的意见可以增强报表使用者对企业财务报表的信任度。
         
        3.很内行的；极称职的；高水平的 showing that sb is well trained and extremely skilled
        While Celia disliked the statement's emphasis and some allusions, she conceded mentally that Stavely sounded professional and impressive.
        西莉亚尽管不喜欢声明强调的重点和一些暗示，但内心里还是承认斯塔弗利的话听起来很内行，也很能打动人心。
         
        n.
        1.职业选手 [C] person who does a sport or other activity as a paid job rather than as a hobby
        He plays the flute like a professional.
        他吹长笛已达到专业人员的水平。
         
        2.专家，内行 [C] a person who does a job that needs special training and a high level of education
        A hotelier is a professional in the hotel business
        旅馆经理是旅馆业的内行。
         
        二、学会professional的用法了吗？来做个小测试巩固一下
        After he won the amateur championship he turned _____________.
        他获得业余赛冠军后就转为职业运动员了。