这一周，我报名参加一项活动——环保志愿者。
This week, I enrolled in an activity-environmental protection volunteers.
你想参加一项活动，会比较容易，如果你窈窕健康？
Do you want to participate in an activity that would be easier if you were slim and healthy?
在每一个实验中，参与者被要求参加一项活动，活动内容多种多样，可能是参加一个公车之旅，也可能是到一个美食广场吃饭。
In each experiment, individuals were asked to participate in an activity - which ranged from going on a bus tour to eating in a food court.
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