BBC在线收听下载:一架从吉隆坡飞往北京的航班失去联络

短语讲解：

1. More than 50 international observers from the Organization for Security and Cooperation in Europe have been turned back as they tried to enter Crimea, as in previous occasions, they were stopped by pro-Russia paramilitaries.

more than 不只是; 很; 超过; 在…次以上
例句：More than 1000 turned up.
最后共有1000多人出席。

2. The fact of shots were fired or be as a warning is likely to be seen as another show of Russian defiance in Crimea and another slap in the face for the international community.

be likely to 可能
例句：Remain at a price or be likely to rise.
停在一个价位上或有可能上升。

3. The United States says it's deeply concerned about what is described as the recent escalation of violence in the Sudanese region of Darfur.

concern about 使（自己）关心…
例句：Public concern about environmental pollution is mounting.
公众对环境污染的担忧在不断加剧。 

4. There's been no word so far from Khartoum.

so far 到目前为止; 迄今为止
例句：So far I have no regrets.
到目前为止，我并不后悔。

5. At least 21 people have been killed in nearly a month of protests.

at least 至少
例句：Read at least 30 books.
至少读30本书。

6. President Nicolas Maduro said all parties were invited to take part in a dialogue for peace.

take part in 参加…，参与…活动
例句：Take part in something you believe in.
参与到你所信仰的事情当中。