求翻译：12月12日下午,一支由复旦学生为主体的探险队进入尚未开发的黄山景区探险,并在山中迷路.经过十几小时的紧张搜救,18名学生全部安全脱险,但一名24岁的警察在营救行动中不幸坠崖牺牲.是什么意思？

The afternoon of December 12, a Fudan student from the expedition into the adventure of untapped Huangshan scenic area, and get lost in the mountains After ten hours of intense search and rescue, 18 students out of danger all the security, but a 24-year-old Unfortunately, police in the rescue operat

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On December 12 the afternoon, enters the Huangshan Mountain scenic area exploration by the second dawn student for the main body exploring party which not yet develops, and becomes lost in the mountain. After several hour intense search and rescue, 18 students safely are out of danger completely, bu

On December 12, a team of Fudan student-centered adventure expeditions into the unexplored Huangshan scenic spot, and got lost in the mountains. After more than a dozen hours of intensive search and rescue, 18 students all the security danger, but a 24 years old, police in the rescue operations in t

On December 12, a team of Fudan student-centered adventure expeditions into the unexplored Huangshan scenic spot, and got lost in the mountains. After more than a dozen hours of intensive search and rescue, 18 students all the security danger, but a 24 years old, police in the rescue operations in t