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

Some people can train themselves to do it, but it's contrary to the way the brain wants you to behave.

一些人可以训练自己做到这些,但这违背了大脑的意愿

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