名词
中文翻译：自由运动
同义词：
['free activity', 'free workout']
例句：
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1. I enjoy free exercise at the gym every morning.
我每天早上在健身房喜欢做免费锻炼。
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2. The gym offers a variety of free exercises for all levels.
健身房为所有水平的人提供各种免费锻炼。
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3. She decided to take up free exercise classes to stay fit and healthy.
她决定参加免费锻炼课程来保持健康和活力。