职业中的致癌物质—每年至少导致152 000例癌症死亡。

Occupational carcinogens - responsible for at least 152 000 cancer deaths per year.

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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。

Background: Animal studies suggest that hydrazine is a lung carcinogen, but human studies have been rare, rather small, and limited to cancer mortality.

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同时，有没有确凿的证据，但它潜在的健康风险给人类，它被认为是可能的人类致癌物质，由国际癌症研究机构。

While there's no conclusive evidence yet that it has potential health risks to humans, it is considered a probable human carcinogen by the International Agency for Research on Cancer.

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