此摘要任务信息汇总了从所包括子任务的最早开始日期到最晚完成日期之间时间段的信息。
This summary task information summarizes the period between the earliest start date and latest finish date of all the included subtasks.
不丹是世界上最晚开通电视的国家，1999年电视才进入不丹人民的生活。十年前，不丹才开始建立起自己的电影产业。
Bhutan was the last country in the world to allow TV in 1999 and has only in the past decade established its own movie industry.
不丹是世界上最晚开通电视的国家，1999年电视才进入不丹人民的生活。十年前，不丹才开始建立起自己的电影产业。
Bhutan was the last country in the world to allow TV in 1999 and has only in the past decade established its own movie industry.
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