BBC在线收听下载:英国伦敦桥遭遇恐怖袭击

短语讲解：

1.They've also carried out controlled explosions.

carry out 进行; 执行; 完成; 抬出去
例句：The Social Democrats could still carry out their threat to leave the government
社会民主党人仍有可能将其退出政府的威胁付诸实施。

2.In other news, tens of thousands of people have attended a candle-lit vigil in Hong Kong to mark the 28th anniversary of the Square Masscare in Beijing.

tens of thousands of 成千上万; 千百万; 千千万万
例句：Within our own galaxy there are probably tens of thousands of planetary systems.
在我们自己的星系里可能有数以万计的行星系。