BBC在线收听下载:奥巴马审查控制枪支暴力的提案

1. He said more than 300 detainees had been released in the past week since he formed a government committee to look into protesters’ demands.

more than 多于
例句：She was no more than 16.
她是不超过16个。
look into 在…里查资料
例句：We must send someone to look into the matter.
我们必须派人调查此事。

2. The petition calls for fair hearings for prisoners warning that disaffection is growing, leading to protests and sit-ins.

call for 要求
例句：This is not a call for articles of impeachment.
这不是一个要求弹劾条款。
lead to 导致
例句：Attacks can also lead to counter-attacks.
攻击也可能导致回击。

3. Long queues have formed in Havana outside embassies and the passport office after new legislation came into force allowing Cubans to travel abroad.

come into force 开始生效
例句：When do the new safety rules come into force?
新的安全规则何时生效？

4. By looking at small variations in the genes, they were able to see who was closely related to whom.

look at 看
例句：Look at the picture.
你看这张照片。
be able to 能够
例句：We'll be able to smooth away these difficulties.
我们能够克服这些困难。