and also intensify vaccination against all infectious agents, all viruses that are known to be strongly associated with the development of cancer. The government should increase its efforts to prevent illnesses with links to cancer, he says,such as hepatitis, a disease of the liver, and the human papillomavirus, which is transmitted during intercourse and is linked to cervical cancer.

VOA: standard.2010.06.16

So, Freud believed there were five stages of personality development, and each is associated with a particular erogenous zone.

弗洛伊德认为人格发展,分为五个阶段，且每个阶段都与特定的动欲区有关。

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