VOA常速英语:New Malaria Vaccine Passes Safety Test

短语讲解：

1. The fight against malaria may have taken a promising step forward with the latest tests of a new kind of vaccine, which aims to keep people healthy and prevent the infection from spreading.

prevent from阻止, 防止
例句：His prompt action prevented the fire from spreading.
他的果断行动制止了火势的蔓延。

2. In contrast, says researcher Robert A. Seder of the U.S. National Institute of Allergy and Infectious Diseases, this new vaccine includes a deactivated version of the entire parasite.

in contrast相比之下
例句：It was cold yesterday, but in contrast it's very hot today.
昨天天气寒冷, 而相比之下今天却很热。

3. "So instead of picking out one or two or three genes," he says, "you have the potential for what we call breadth - generating an immune response that would be broad rather than narrower. And so that would be a good thing."

instead of(用…)代替…, (是…)而不是…, (用…)而不用…
例句：He has been playing all afternoon instead of getting on with his work.
他整个下午一直在玩, 没有继续工作。
pick out挑选, 选择; 选拔
例句：She was picked out from the whole class to represent them at the other school.
从全班中选出她来作为去另一学校的代表。

4. Plasmodium goes through many stages in its life cycle.

go through经过，度过
例句：His relationship with Mary went through four stages.
他与玛丽的关系经历了四个阶段。

5. They remove the sporozoite from the mosquito's salivary glands and then subject it to radiation.

remove from从…中移开〔拿走, 除掉〕
例句：She removed mud from her shoes.
她擦去了鞋上的泥。

6. And no one knew if the weakened sporozoites would jump-start the immune system to protect against malaria.

protect against保护, 保卫
例句：You need warm clothes to protect you against the cold.
你需要暖和的衣服来御寒。

7. To find out why, the researchers then switched to laboratory animals, and Seder says they concluded that the problem was the way the vaccine was administered.

find out发现, 看穿, 揭发, 找出;查明
例句：We must find out the truth of the matter.
我们必须弄清楚事情的真相。

8. The next stage of human testing - using intravenous administration - is due to start in October.

due to预定, 预期
例句：The boat is due to arrive at 12.
船预计在12点到。