名词
中文翻译：练习者
同义词：
['trainer', 'instructor']
例句：
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1.The teacher is an excellent exerciser of English.
这位老师是英语的杰出教师。
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2. The gymnast is an expert in the art of aerobic exercise.
体操运动员是有氧运动艺术的专家。
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3. The coach is responsible for the training and development of the athletes.
教练负责运动员的训练和培养。