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活动家，一名男子和一名女子正在绘制海报，用于制作拯救地球的抗议标语，并在学生宿舍里绘制标语。 免版税库存图片 活动家，一名男子和一名女子正在绘制海报，用于制作拯救地球的抗议标语，并在学生宿舍里绘制标语。
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