VOA慢速英语:A New AIDS Plan for the US, and New Hopes for a Vaccine

be busy doing忙于(做)...

例句：He who is too busy doing good finds no time to be good.
      太急于做好事的人，反而找不到时间去做好人。

2.It also aims to make sure infected patients get treatment more quickly.

make sure设法确保出现某事物

例句：We and our friends will make sure of that.
      我们和我们的朋友要确保这一点。

3.Thirty million dollars from the health care reform law is to go to support prevention activities, including expanded HIV testing.

including是插入语，后面跟包括的成分。也可以换成另外一种表达方式，不过所包括的内容在前面，……included。

插入语多半用逗号与句子隔开，用来表示说话者对句子所表达的意思的态度。插入语可能是一个词、一个短语或一个句子。

4.Over one million Americans are living with the virus, out of an estimated thirty-three million people worldwide.

out of表示分数，比例。

英语中分数的其中一种表达方式是借助介词表示分数，介词前的数词是分子，介词后的数词是分母。例如：

Ninety-nine people out of a hundred，if they were asked who first found America， would answer Clumbus．
如果要问是谁首先发现美洲，一百个人中有九十九个（百分之九十九）将回答是哥伦布。

这种结构中的介词主要有in，out of，of以及to

5.The U.N. AIDS agency gives credit to better use of preventive measures. It says young people in Africa are waiting longer to have sex.

give credit to称赞，赞扬，相信，信赖