External environmental causes of cancer are factors in the environment that increase risk of cancer such as air pollution, UV radiation and indoor radon.
外部环境致癌因素是指环境中导致罹患癌症的危险升高的因素，如空气污染、紫外线辐射及室内的氡等。
External environmental causes of cancer are factors in the environment such as pollutants that increase risk for cancer.
外部环境致癌因素是指环境中的污染物等导致罹患癌症的危险升高的因素。
Cancer data may point to environmental risk factors or high risk behaviors, so preventive measures can be taken to reduce the number of cancer cases and resulting deaths.
癌症数据可能定位环境危险因素或者高危行为，因此预防措施可以降低癌症发生和导致死亡的数量。
Environmental and occupational agents may be contributing factors in the etiology of breast cancer, research has shown.
环境与职业化学制剂影响可能是导致乳腺癌发病的因素，研究表明。
Besides performing biomedical research, the new project also will strive to communicate findings that can lessen the risk of breast cancer via awareness and avoidance of environmental risk factors.
此外，进行生物医药的研究，这项研究的成果也能通过认知和提醒避免风险因素，来减轻乳腺癌的风险。
It is also thought that cancer of the pancreas may be linked to environmental factors such as exposure to petroleum products.
它也认为，癌症的胰腺，可能与环境因素，如接触到石油产品。
I think environmental factors are probably the main cause. In Beijing alone, 70-80 percent of all fatal cancer cases are related to the environment.
我认为环境问题是最主要的原因。但在北京，70%——80%的重癌症病例都和环境有关系。
Objective To estimate the population attributable risk for environmental risk factors in the development of gastric cancer.
目的分析胃癌的环境危险因素并进行归因危险度评价。
The occurrence mechanisms on cancer including mutation of oncogene and antioncogene, effect of environmental factors were reviewed.
根据近年的研究进展，从癌基因与抑癌基因的突变及环境因素的影响等方面综述了癌症的发生机理。
Purpose to explore the relationship between birth order and primary liver cancer (PLC), and to estimate the relative importance of environmental and genetic factors in development of PLC.
目的探讨出生顺序与肝癌发生的关系，估计环境因素与遗传因素在肝癌发生中的相对作用。
Now it is thought that individual susceptibility is a main factor of lung cancer besides environmental factors.
现有理论认为，除了环境因素，个体易感性是引起肺癌的主要因素之一。
To explore the environmental risk factors of female breast cancer in Tangshan area.
探讨唐山地区女性乳腺癌的环境危险因素。
To explore the environmental risk factors of female breast cancer in Tangshan area.
探讨唐山地区女性乳腺癌的环境危险因素。
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