丹麦哥本哈根肿瘤流行病学协会的研究人员通过对中枢神经系统的研究发现，长期使用手机的人群与不使用手机的人群癌症发病率几乎是一样的。

Researchers led by the Institute of Cancer Epidemiology in Copenhagen found cancer rates in the central nervous system were almost the same in both long-term mobile phone users and non-users.

youdao

肿瘤学与癌症是医学的一个分支。

Oncology is a branch of medicine that deals with cancer.

youdao