求翻译：了解2004年河北省有偿供血人员大普查后滦县艾滋病新发现的流行趋势,探讨艾滋病防治的有效预防对策,为预防和控制艾滋病的流行提供科学依据。是什么意思？

Understanding of Hebei Province in 2004 paid blood of the personnel of the census found Luanxian AIDS trends, explore effective preventive measures for AIDS prevention, and provide a scientific basis for prevention and control of AIDS epidemic.

About 2004 Hebei paid blood supply officers following a census County new AIDS new-found fashion trend, explore effective prevention of HIV AIDS prevention measures for the prevention and control of HIV AIDS prevalence provides a scientific basis.

After understood in 2004 the Hebei Province paid blood supply personnel big general survey the Luan Xian AIDS recent discovery popular tendency, discusses the effective prevention countermeasure which AIDS prevents and controls, provides the scientific basis popularly for the prevention and control

Understanding paid blood donors after officers in census in 2004, Hebei province luanxian AIDS new fashion trends, explore the effective prevention of AIDS, provide the scientific basis for prevention and control of HIV AIDS epidemic.