CRI听力:China's Vaccine for Hepatitis E to be Available Soon

2. infect vt. 传染;侵染;感染
例句：The flu virus infected almost the entire class.
全班几乎人人都染上了流行性感冒病毒。

3. vaccine n. 疫苗;痘苗
例句：She takes a vaccine against influenza every fall.
她每年秋季接种流感疫苗。

4. alternative n. 选择的余地, 可供选择的机会
例句：I'm afraid I have no alternative but to report you to the police.
恐怕除了向警方告发你以外, 我是别无选择了。

5. sponsor vt. 赞助, 发起, 主办
例句：The company sponsored several TV programs.
这家公司赞助了几个电视节目。

6. approval n. 批准, 认可
例句：The new proposals have won the approval of the board.
新建议得到董事会的认可。

7. deem vt.认为, 相信
例句：He deemed it wise to refuse the offer.
他认为拒绝这一提议是明智的。

8. priority n.优先权, 重点；优先考虑的事
例句：The development of the national economy is a top priority.
发展国民经济是应予以最优先考虑的事。

9. assistance n. 帮助, 援助,支持
例句：You can not rely on his assistance.
别指望他帮你。

10. target n. (欲达到的)目[指]标
例句：The factory met its production target ahead of time.
工厂提前完成了生产指标。