VOA慢速英语:How Can Air Traffic Controllers Lose a Plane?

短语讲解：

1. The search for a Malaysia Airlines passenger jet expanded this week.

search for 搜索，搜寻
例句：Many are making it easier to search for content.
许多人正尝试使搜索变得更容易。

2. But John McGraw says there are also a lot of devices inside the Triple-7 that can help searchers follow its movement.

a lot of 许多的; 诸多
例句：He knew a lot of facts!
他知道了许多真实的事！

3. There are also at least three ways the pilots can communicate with controllers.

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

4. If the plane is downed in the ocean, the black box sends out a signal that can travel up to three kilometers away.

send out 发送;  发出
例句：Please send out the letters quickly.
请将信快速发出去。

5. Air traffic controllers in both countries say they did not receive any message that the plane may have been in trouble.

in trouble adv.处于不幸中，在监禁中
例句：Now both are in trouble.
现在，两家都身陷困境。

6. That is far from where controllers lost contact with the plane.

contact with 与…有交往[联系]
例句：Avoid close contact with birds.
避免与禽鸟有亲密接触。

7. But China later said it could not confirm the objects belonged to the missing aircraft. 

belong to 属于
例句：Which country do you belong to?
你到底是哪个国家的？