眩晕的景象！(A dizzying scene!)

看看你的日历！12月11日是国际山日，这是联合国大会2003年指定的一个特别日子。今年纪念活动的主题是“恢复山区生态系统”，与联合国生态系统恢复十年有关。
原文：
Look at your calendar! December 11th is International Mountain Day, a special day designated by the United Nations General Assembly in 2003. The theme of this year's commemorative event is "Restoring Mountain Ecosystems", which is related to the United Nations Decade of Ecosystem Restoration.
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