名词
中文翻译：跑者
同义词：
['runner', 'athletics', 'sportsman']
例句：
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1. She is a runner who loves to run outdoors.
她是一个喜欢在户外跑步的跑者。
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2. He is a professional runner who has won many championships.
他是一个专业的跑者，已经赢得了许多冠军。
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3. The marathon is a popular event for runners to participate in.
马拉松是跑者参与的热门活动。