BBC news 2010-08-15 加文本

1.No oil  has been spilling from the ruptured well in recent weeks, but several  Gulf states continue to back up a perception that both beaches and seafood  have been tainted by oil.

back up支持，证实；增援，后援

例句：The policeman wouldn't have believed me if you hadn't backed me up.
      如果当时你不支持我, 警察是不会相信我的。

2.Police in Mexico say members of drug cartels blocked off at least 13  major roads in the city of Monterrey on Saturday.

block off关闭; 封闭; 封锁

例句：The police blocked off the street where the gunman was hiding.
      警察封锁了持枪歹徒躲藏的那条街。

3.Drivers were dragged  out of their vehicles by armed men and their cars used to cut off  roads.

drag  out使拖延,延长

例句：The thief was dragged out of his hiding place.
      那个小偷被人从隐藏的地方拖了出来。

4.We’re talking about an international criminal group made up of more than  200 people.

made up of由…组成，由…构成

例句：The genre made up of such works.
      喜剧体裁由这样作品形成的体裁。