VOA常速英语:Study Shows PFCs Can Reduce Vaccine Effectiveness

2. vaccinate vt.给…接种疫苗
例句：Were you vaccinated against smallpox as a child?
你小时候打过天花疫苗吗？

3. debilitate vt. 使(人或人的身体)非常虚弱
例句：Heat debilitates many people.
酷热使得很多人体弱力衰。

4. diet n. 饮食,食物
例句：Their diet chiefly consists of grain and vegetables.
他们的饮食主要是谷类和蔬菜。

5. striking adj. 显著的, 突出的
例句：There is a striking difference between Jane and Mary.
简和玛丽之间有显著的差异。

6. coverage n. 提供的数量；覆盖范围（或方式）
例句：This is an insurance policy with extensive coverage.
这是一项承保范围广泛的保险。

7. subsequent adj. 随后的, 继…之后的
例句：The day subsequent to your visit he died.
你探望后的第二天, 他便去世了。

8. recurrence n. 复发;反复;重现
例句：A recurrence of this kind of illness is possible.
这种病有可能复发。

9. stick v. 插入, 刺入, 卡住
例句：The key sticks in the lock.
钥匙卡在锁里了。

10. adverse adj.不利的, 有害的
例句：Dirt and disease are adverse to the best growth of children.
肮脏与疾病对儿童健康成长不利。