BBC在线收听下载:非洲联盟将增加驻索马里部队数量

短语讲解：

1. Another boat carrying hundreds of migrants has sunk between Sicily and Tunisia with dozens of people reported dead.

dozens of 很多
例句：I've been there dozens of times.
我去那里很多次了呢。

2. He said his government’s plans to rebuild institutions have been opposed and that his opponents within the country’s legislative body make sure they failed or never happened. He blamed the unnamed political bloc within congress for his abduction.

make sure 把事情弄清楚，核实或查明某事物
例句：I'll make sure you havethe finest seat.
我得保证你选到最好的位子。

3. The African Union says it will increase its force in Somalia by around a third to step up its fight against militants from the Islamist group al-Shabab.

step up 走上；（使）增加
例句：It plans to step up its protests.
他们计划加紧他们的抗议活动。

4. The AU said its mission in Somalia, Amisom, would have more than 6,000 additional troops, taking the total number to 24,000.

more than 不只是；很
例句：More than 100 people were wounded.
爆炸还造成100多人受伤。