Rees and his team looked into why different types of skin cancer occur in different parts of the body.

里斯和他的研究小组调查了为什么不同类型的皮肤癌发生在身体不同的部位。

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Almost 80% of cases today and an even higher proportion of deaths from cervical cancer occur in low-income countries, where access to cervical cancer screening and treatment virtually does not exist.

目前近80%的宫颈癌病例以及更高的死亡率发生在低收入国家，那里几乎无法获得宫颈癌筛查和治疗。

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Given the widespread presence of base stations in the environment, it is expected that possible cancer clusters will occur near base stations merely by chance.

鉴于基台在环境中的广泛存在，应预见到可能的成群癌症病例在基台附近出现仅仅是出于偶然。

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They estimate that for every 2m five-year-old girls who travel one round-trip a week, one additional breast cancer would occur from the scans.

BBC: Radiation levels from airport full body scans 'safe'

Dr Feld wondered if the changes that occur during cancer would show up using his new method.

ECONOMIST: Microscopy

For example, if we compare patients with colon cancer to those without across the entire genome we can find some genotypes that occur more frequently in the cancer group than in the non-cancer group.

FORBES: Why Personalized Medicine Is Bunk