The third phase in 2011 will be invited to the Universal Postal Union Member States to issue stamps to commemorate the first time in 1981, AIDS was found and named.
2011年第三阶段将邀请万国邮政联盟会员国发行邮票，纪念1981年艾滋病的首次发现和命名。
The third phase in 2011 will be invited to the Universal Postal Union Member States to issue stamps to commemorate the first time in 1981, AIDS was found and named.
2011年第三阶段将邀请万国邮政联盟会员国发行邮票，纪念1981年艾滋病的首次发现和命名。
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