名词
中文翻译：活动计
同义词：
['activity gauge', 'activity meter', 'activity monitor']
例句：
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1. The activity meter on the gym floor shows the number of people using the equipment.
健身房地板上的这个活动计显示使用器材的人数。
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2. The activity meter in the classroom is used to measure how many students are participating in class activities.
教室里的这个活动计用来测量有多少学生参与课堂活动。
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3. The activity meter helps teachers monitor student engagement and participation during class discussions.
这个活动计帮助老师监控学生在课堂讨论中的参与度和积极性。