News Plus慢速英语:美科学家招志愿者喷活体病毒 研发流感疫苗

重点讲解：
1. turn out
原来是；结果发现；
eg. It's hard to predict how things will turn out.
事情还不定怎样呢。
eg. It turned out that my surmise was correct.
结果表明我的推测没有错。
2. fend off
挡住，抵挡（攻击）；
eg. He raised his hand to fend off the blow.
他抬起手来抵挡那一拳。
eg. This medicine is enough to fend off a chill and fever.
这种药能祛寒退热。
3. something of a+名词
有点儿；有几分；
eg. His veto was something of a surprise.
他的否决一定程度上是令人惊讶的。
eg. Yet dismissing them has proved to be something of a mistake.
而现在已经证实，忽略了它们就犯下了错误。