And without a vaccine, Dr.Fauci says the best methods of prevention are these: encourage people to limit the numbers of sexual partners encourage men to use condoms train more doctors to perform adult male circumcision empower women to choose their sex partners and protect themselves from getting the virus that causes AIDS All of these goals still remain major challenges.

VOA: standard.2010.07.17

Why did you choose this major in the first place?

你为什么一开始就选这个专业呢？

为何选那门专业？ - SpeakingMax英语口语达人