求翻译：因为实验研究发现人类所患的与吸烟有关的癌症难以在动物身上仿效，几十年来抽烟被认为是安全的。相信香烟对人无害，人们继续点燃香烟，并最终死于癌症。是什么意思？

Experimental study found that humans suffering from smoking-related cancer is difficult to be replicated in animals for decades smoking is considered to be safe. I believe that cigarettes are harmless to people, people continue to light the cigarette, and eventually died of cancer.

Experimental studies have found that human suffering from smoking-related cancer is difficult to follow the animals for 10 years, smoking is considered to be safe. For those who believe that cigarettes environmentally sound, and people continue to lit their cigarettes, and ultimately died of cancer.

Because the experimental study discovered the humanity contracts imitates with difficulty with the smoking related cancer on the animal body, for several dozens years smoke were considered are safe.Believed the cigarette is harmless to the human, the people continue to light the cigarette, finally a

Experimental study of humans suffering from smoking-related cancer is difficult to follow in animals, smoking was considered for decades to be safe. Believe that cigarette is harmless to people, people continue to light a cigarette, and eventually died of cancer.

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