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(PARIS, AFP)Mountain biking is so dangerous that body armor should be worn.
（法新社巴黎电）骑登山车很危险，因此单车骑士应该要穿上护具。
In a study of 84 patients，doctors found one in five needed surgery.
医师们在一份针对八十四位患病者所作的研究发现，每五个患病者中就有一位需要进行手术。
The surgical procedures included one case of removal of a damaged kidney and a chest drain.
手术的过程包括摘除一边受损的肾脏以及胸腔排水。
