BBC news 2010-07-18 加文本

1.Eyewitnesses said the attackers set fire to more than half a dozen houses as well as a church in the early hours of Saturday morning.

set fire to放火烧, 点着了…

例句：The police hasn't found out who set fire to the storehouse.
      警方还没查出是谁放火烧了仓库。

      Setting fire to the letter, he made her watch it burn.
      他点火烧那些信时让她看着那信燃烧。

2.The heroin was found with quantities of raw opium and ammonium nitrate which officials say could have also been used to make roadside bombs.

quantities of大量的,许多…

例句：We've had quantities of rain this summer.
      今年夏天雨下得很多。

      The well expelled great quantities of gas.
      那口井喷出大量的天然气。

3.Celebrations are on ice until the results of definitive tests come back.

on ice冷冻,冷藏,暂时搁置;把…关入监牢

4.Down in the cold, murky depths of the Baltic of the Aland Islands between Finland and Sweden, he and fellow divers stumbled across what could be a consignment of champagne sent by King Louis XVI of France to the Russian empress, Catherine the Great, in about 1780.

stumble across偶然发现

例句：He stumbled across the answer after years of research.
      经过几年的研究他无意中发现了答案。