BBC在线收听下载:德国一架客机在法国南部坠毁

短语讲解：

1. Video footage of the remains of the Airbus A320 shows a mass of tiny pieces of wreckage strewn across the site of a steep valley.

a mass of 大量的
例句：The azaleas made a mass of colour in the garden. 
杜鹃花给花园里添上一大片色彩。 

2. The United States says it's changing its plans to halve the number of troops in Afghanistan by the end of this year, following talks in Washington between the U.S. and Afghan Presidents.

by the end of 到…为止
例句：By the end of next year, they will have finished work on the new stadium. 
到明年年底，他们将建成这个新体育 

3. Speaking at UEFA's annual meeting, he said violence sparked by nationalism and extremism was threatening order at Europe's stadiums. Speaking through an interpreter, Mr. Platini called for the creation of a European sports police force.

call for 需要
例句：Different circumstances call for different tactics. 
不同的情势需要不同的策略。