BBC news 2009-07-27 加文本

play down对...不重视, 降低, 贬低, 屈尊随群

例句：The boss sought to play down the risk of that project.
      老板本试图降低该项目的风险。

2.The fighting in the city of Bauchi began when armed men attacked a police station, apparently in retaliation for the arrest of one of their leaders several days ago.

in retaliation for报复，复仇

例句：the act of taking revenge (harming someone in retaliation for something harmful that they have done) especially in the        next life.
      尤其是下一代采取报复的行动（用他们曾做过的伤害的事情伤害他）。

3.Four policemen died as they tried to prevent the attacker from entering a public building in the capital Grozny.

prevent from 阻止，防止

例句：Police are all around the Administration block to prevent attacks from the terrorists.
      为了防止恐怖分子袭击，政府大楼附近到处都是警察。

4.He’s had a series of tests at a military hospital and so far his office said nothing had been found.

a series of 一系列..., 一批...

例句：All year round, millions of visitors are drawn to the city for a series of remarkable social and cultural events.
      这个城市一年四季都会吸引数百万游客前来参加一系列与众不同的社会和文化活动。

so far迄今为止

例句：Mosquitoes have been biting me the whole night so far.
      蚊子整晚一直不停地咬我。