VOA常速英语:US Scientists Expand Scope of HIV Vaccine Study

短语讲解：

1. HVTN stands for the HIV Vaccine Trials Network, which is funded by the National Institutes of Health.

stand for代表, 表示
例句：UN stands for the United Nations.
UN是联合国的缩写。

2. “The trial is being expanded both in terms of the number of participants, as well as what the trial is looking to answer,” said Mitchell Warren, head of AVAC, the AIDS Vaccine Advocacy Coalition, who’s following the study’s developments.

in terms of 就…而言, 从…方面说来
例句：He thought of everything in terms of money.
他是从钱的角度来看每一件事。
look to依靠〔指望〕(某人或某事)
例句：I look to you to support me in this matter.
在这件事上我要靠你支持。

3. Originally, the study focused on whether the vaccine regimen could lower the amount of HIV in the blood if people were to become infected after being vaccinated.

focus on集中于，致力于
例句：Many firms are focusing on increasing their markets overseas.
许多商行都专注于扩大国外市场。

4. Because of the Thai trial, what we saw in that vaccine actually preventing infection was, wow, we really need to then look differently at HVTN 505 and expand its ability to look at the question: could this vaccine actually also prevent infection, prevent acquisition of HIV?

because of因为, 由于
例句：It was because of the job that he had taken the flat.
他因为工作的原因租了那套公寓。
look at评判; 审视
例句：The difficulty can now be looked at in a different light.
现在可以用不同的角度来看这个困难。

5. One is a DNA vaccine that has snippets of HIV that can’t cause HIV at all, but is meant to kind of prime the immune system.

be meant to有意要,打算
例句：This restaurant is meant to be excellent.
人们认为这家餐厅非常好。

6. It’s used as a vector or means of delivering the vaccine.

be used as被……用作
例句：Charcoal can be used as a fuel.
木炭可以用作燃料。

7. If we just created a vaccine trial or a treatment trial and said anybody can be in our trial, we just want bodies, at the end of the day we would look at the answer and say we don’t know what this means because these people were so different

at the end of在…结尾,在…末端
例句：At the end of his speech, the crowd caught alight and began cheering wildly.
讲在他演讲快结束的时候, 人群情绪激昂, 狂热欢呼。