He asked volunteers to watch different films and dwell on positive or negative events in their life, designed to put them in either a good or bad mood.
他要求志愿者观看不同电影，并想著他们人生中的正面或负面事件，借此来让他们处于好或坏的心情中。
He asked volunteers to watch different films and dwell on positive or negative events in their life, designed to put them in either a good or bad mood.
他要求志愿者观看不同电影，并想著他们人生中的正面或负面事件，借此来让他们处于好或坏的心情中。
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