The two factors, the hot and humid environment having a negative effect on all systems and CMW leading to the brain mechanical injuries, work together so as to cause a more serious wound.
而高温高湿环境下颅脑火器伤既有湿热环境对全身各系统功能影响，又有颅脑火器伤对颅脑功能的机械性损害，二者因素相互作用造成机体更加严重地损伤。
Mechanical problems were blamed for an August 2007 crash in which there were no injuries.
在2007年8月发生的坠毁事故同样被归咎于机械故障，但那次没有人伤亡。
The cause of this disease is not clear now. Generally speaking, chronic accumulated injuries, mechanical traction and stimulation are believed to be the major causes.
本病的病因目前尚未十分明了，一般认为，膝关节慢性积累性损伤，机械性牵拉和刺激是主要原因。
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