is always disability
总是残疾
以上为机器翻译结果，长、整句建议使用 人工翻译 。
BackgroundSevere polytrauma is a high-energy trauma, has complicated associated injuries with massive hemorrhage, and always leads to high mortality and the rate of disability.
背景严重多发伤是一种高能创伤，由于创伤重，合并伤复杂，出血量多，常导致高死亡率和高致残率；
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