The cell research of Greek-American physician George Papanikolaou, who identified cervical cancer cells in vaginal smears in the 1920s, led to mass cervical pap smear tests from the 1950s onwards.

希腊裔美国医生乔治·帕帕尼科劳的细胞研究，他在20世纪20年代道片识别出癌细胞，这一果自20世纪50年代起推动了大规模片筛查的开展。

They're just trying to maintain their health or do something sensible like have a cervical smear or stop getting pregnant until they want to be pregnant or they're trying to have the best pregnancy they can.

他们只是想保持健康，或做一些明智的事情，比如接受片检查，或者在不想怀孕之前避免怀孕，或者努力拥有他们能拥有的最好的孕期。