以下为句子列表：
英文: A gene that causes the transformation of normal cells into cancerous tumor cells, especially a viral gene that transforms a host cell into a tumor cell.
中文: 致癌基因导致正常细胞转变为癌变细胞的基因，尤其是一种把寄主的细胞变为肿瘤细胞的病毒基因
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英文: A laser beam can completely destroy a cancerous growth without leaving behind any dangerous cells that could start a new tumor.
中文: 激光光束可以彻底毁灭癌变组织，不会留下任何可能产生新的癌变的细胞。
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英文: According to this study, severe dysplasia and some moderate dysplasia were precancerous lesions.
中文: 对141例采用内镜粘膜切除术，其中22例随诊满5年，其5年生存率为100％。
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英文: Although a few governments have taken limited measures, the population continues to puff its way to a cancerous death.
中文: 虽然一些政府已经制定出了一些有限的制度，但是吸烟者的数量继续上，向癌症死亡迈进。
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英文: At one point a cancerous growth on his face became so prominent that a sympathetic doctor operated on it without charge, leaving him with a disfigured nose.
中文: 在某一时刻他脸上的癌症发展变得如此突出，以致于一位有同情心的医生免费给他作了手术，留给他一个变丑的鼻子。
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