BBC news 2010-01-02 加文本

1.Eyewitnesses say a volleyball match was under way when a car filled with explosives was driven onto the ground.

under way进行中,在行进

例句：Construction is under way.
      工程正在进行中。

      The construction project got under way last week.
      这建筑工程于上周开始进行。

2.The Yemeni Foreign Minister Abu Bakr al-Qirbi told the BBC his government hoped the meeting would provide help for Yemen to develop its economy so as to undercut the appeal of the militants.

so as to使得,以致 如此...以致于

例句：He and Jane decided to leave so as to avoid any more unpleasantness.
      他和简决定离开，以避免更多的不快。

3.He said Iraqi investigations had confirmed unequivocally that Blackwater guards had committed a crime when they opened fire at a busy road junction in the absence of any threat justifying such action.

in the absence of在缺乏……时；在……不在时
 
例句：In the absence of responsibility, no work can be accomplished.
      缺乏责任感，没有工作可以完成。