VOA慢速英语2013.11.05
[audio]http://sound.yywz123.com/tingbbs/voa/voa20131105.mp3[/audio]Dr. Okwo-Bele says limited resources for health care systems also threaten the ability of poor countries to vaccinate children. 贝里博士表示,资源有限的医疗体系也威胁到了贫穷国家为儿童接种疫苗的能力.
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