She stressed that widespread protection from accination would take years to achiee and women would need regular smears in the meantime to ensure they minimised their risk of cancer 她还指出，疫苗推广可能还需花几年时间，女性应行常规检查确保她们自己癌症发病率降至最低。
In developed countries , longer life expectancy but also better diagnostic abilities explain this increase , whereas in developing and middle - income countries , the time bomb of tobacco - related and viral - induced cancer is starting to show its toll 在发达国家，癌症发病率增高可归咎于人们寿命较长和先进的诊断技术，而在发展中国家和中等收入水平国家，吸烟和病毒介导的癌症比率在逐渐增大。
Epidemiologists had long suspected that the low cancer rates in southeast china might be related to coix , a grasslike relative of maize that is a dietary staple in the region and a key ingredient of many traditional chinese herbal medicines 流行病学专家长期以来一直疑心，中国东南部癌症发病率低是由于那里的人们喜欢食用薏苡仁（禾本科植物薏苡） ，此地区的人们喜欢将薏仁作为饭食的成分，薏苡也是许多中药的关键成分之一。
