VOA慢速英语:A Social Network Aims to Speed Up Progress in Science

词汇讲解：

1. frustrated adj. 挫败的，泄气的
例句：He felt extremely frustrated when things went against him.
形势对他不利时,他感到非常失望。

2. productive adj. 多产的，富有成效的
例句：We had a productive meeting that solved some problems.
我们开了一个富有成效的会议, 解决了一些问题。

3. accelerate v. （使）加快，（使）加速
例句：Our country should accelerate the economic growth.
我国应加快经济增长。

4. profile n. 简介，概况
例句：The newspaper publishes a profile of a leading sportsman every week.
该报每周刊登一篇关于一名优秀运动员的简介。

5. publish v. 公布
例句：You must hasten and publish your result. 
你必须赶快公布你的结果。

6. spread n. 传播，蔓延
例句：The spread of cholera alarmed the whole city.
霍乱流行使全城的人都恐慌了。

7. dissertation n. 专题论文，学位论文
例句：We spend the final term writing our dissertations.
我们用最后一个学期的时间写论文。