一直以来，各类恶性肿瘤严重威胁着人类的生命健康。
It is well known that malignant tumors have been seriously threatening human's life and health.
室内装饰材料中的有害气体污染，已严重威胁到人类的生命健康。
The harmful gaseous pollution caused by indoor decoration materials has seriously threatened the health and life of human being.
道路交通事故严重威胁着人类的生命健康，已成为世界首位公共卫生问题。
Road traffic accident has been threatening human life and is now the first public health issue in the world.
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