BBC在线收听下载:安理会再举行紧急会议商谈乌克兰危机

1. After armed groups occupied airports and communications buildings, the Ukrainian defense minister accused Moscow of sending 6,000 troops and 30 armed vehicles to back up its Black Sea fleets.
 
back up vi.<篮球>协防，补防; 支持
例句：Bear did nothing to back up the second fund.
贝尔斯登没有采取任何行动支持另一支基金。

2. Although Switzerland is not a member of the EU, it had singed up to the free movement of people as part of a series of agreements aimed at protecting its access to Europe's single market.

sing up 更用力地唱
例句：Sing up everyone; the people at the back can't hear.
后边的人听不到，请各位大声唱。
 
3. A senior United Nations official has broken ranks with UN and publicly called for compensation for the victims of a cholera epidemic in Haiti which killed thousands of people since it began four years ago.

call for 需要; 要求
例句：Chinese companies call for fairer treatment from foreigners.
中国公司要求更公平的对待外国人。

4. One eyewitness told the BBC that about 20 civilians were killed and 25 others were wounded in the air strike which took place on Friday night close to the border with Cameroon.

take place 发生，举行
例句：Elections take place every four years.
选举四年举行一次。
close to 近乎; 临近
例句：Today it is close to zero.
当今，利率接近于零。

5. It's not known who carried out the attack, but the Nigerian military has previously bombed villages that it believes sheltering members of Boko Haram, an Islamist insurgent group.

carry out 执行; 进行
例句：They should also carry out some fundamental reforms.
这些政府也应该执行一些基础性的改革。