BBC在线收听下载:俄罗斯驻土耳其大使遭枪击身亡

短语讲解：

1. The Nigerian President Muhammadu Buhari has ordered the Attorney General to investigate alleged corruption by a number of senior government officials.

a number of 一些; 许多的
例句：The vibrating object has executed a number of oscillations.
物体已经完成了许多次振动。

2. The president's opponents accused him of carrying out a politically motivated witch hunt.

carry out 进行; 执行; 完成
例句：No matter what we do, we must carry out our duties.
无论干什么工作,我们都应履行自己的职责。

3. Leo Majian said she and a small group of other French singers were responsible for introducing Jazz to France during the Nazi occupation of France during World War II.

be responsible for 为…负责，形成…的原因; 主管
例句：You'll be responsible for anything wrong.
出了事唯你是问。