...a professional trumpet player.是什么意思？

...a professional trumpet player.

职业小号手

professional

adj. 专业的，专业性的，职业的；n. 专业人士；

例句
The whole cast executed the production with truly professional aplomb.
全体演职人员以一种真正的专业精神，从容不迫地开始了影片的制作。

trumpet

n. 喇叭，小号，[乐]音栓，喇叭似的声音；vt. 大声说出或宣告；vi. 吹喇叭，吹小号，发出回声；

例句
The trumpet can be heard all over their house...
喇叭声整栋房子都能听见。

player

n. 演员，[体]运动员，[音]演奏者，播放机；

例句
There is no comparison between the knowledge and skill of such a player and the ordinary casual participant.
临时的普通参赛者无法与这种选手所掌握的知识和技巧相提并论。