正文

BBC在线收听下载:澳大利亚科学家识别出避免伤寒的基因

2014-11-11来源:BBC

Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin.

短语讲解：

1.There was a deafening explosion which killed many students on the spot.

on the spot 立刻，当场；在危险中；处于负责地位

Even clever people are not terribly clever when put on the spot.
即便是聪明人在面对难题时也未必就能表现得特别聪明。

The doctor was on the spot a few minutes after the accident.
医生在事故发生几分钟后就赶到现场了。

2.Mikhail Gorbachev has warned that we are on the brink of a new cold war.

on the brink of 濒于，濒临；在…的边缘

The club are on the brink of promotion to the Premier League.
俱乐部即将晋级超级联赛。

The Russian peasantry stood on the brink of disappearance.
俄罗斯农民濒临消亡。