collection policy

例句：

1. 1. The company's collection policy states that all items mustbe returned within 30 days ofpurchase.
   该公司的收集政策规定，所有物品必须在购买之日起30天内返回。
2. 2. Thegovernment has introduced a new collection policy toregulate the sale of illegal drugs.
   政府已经引入了一项新的收集政策来规范非法药物的销售。
3. 3. The school's collection policyrequires students to donate their gently used booksto charity.
   学校的收集政策要求学生将他们不再需要的旧书捐赠给慈善机构。