1. The World Health Organization will classify overnight shift work as a "probable"
carcinogen.
世界卫生组织将通宵工作列为「可能致癌」的因素之一。
2. Background: Animal studies suggest that hydrazine is a lung
carcinogen, but human studies have been rare, rather small, and limited to cancer mortality.
背景：动物研究发现联氨可能为肺部致癌物质，但人类研究相当少，且局限于癌症死亡率之调查。
3. Reform technological process, use as far as possible automation, mechanization and sealed change producer style, reduce
carcinogen and human body to be contacted directly.
改革工艺流程，尽可能采用自动化、机械化和密封化生产方式，减少致癌物质与人体直接接触。
