VOA慢速英语:Iran's Next Step in Building a 'Halal' Internet

词汇讲解：

1. perform vt. 执行; 履行
例句：Each member of the family had his special duty to perform. 
家里人人都有特殊的差使干。 

2. filter vi.过滤; 透过
例句：We must filter out the dirt. 
我们必须滤除尘垢。 

3. frustrate vt.挫败; 阻挠
例句：This is the place that we frustrate enemy. 
这是我们挫败敌人的地方。 

4. sensitive adj.敏感的; 感觉的
例句：He used a very sensitive torsion balance. 
他利用了一架非常灵敏的扭力天平。 

5. hide vt.隐藏; 躲避
例句：Everybody's got something to hide. 
每个人都有见不得人的事情。