BBC news 2010-07-07 加文本

1. In marked contrast to their frosty encounter in March, Mr Obama praised Mr Netanyahu for easing the blockade on Gaza.

in contrast to相比之下

例句：In contrast to her sister, she is very tall.
       与姐姐相比, 她个子很高。

前面加上形容词marked，表示形成鲜明对比

2.It looks as though that's not happening.

as though好像, 仿佛

例句：It sounds as though there is a knock at the door.
      听起来好像有人在敲门。

      It seems as though it was spring already.
      现在好像是春天了。

3.A criminal investigation has also begun into the bombing of a house in Gaza in which more than 100 members of the same family were taking shelter.

take shelter躲避风雨，避难

例句：He took shelter in a house nearby.
      他在附近房子避难。

4.Supporters of the law in Arizona, where illegal migrants may account for as much as 8% of the population, say the state was forced to act because the federal government had failed to do so.

account for占有，占...百分比

例句：APEC members account for more than half of the world's economic output.
      亚太经合组织成员的经济总量在世界占一半以上。