VOA慢速英语:US Company Developing Space-Based Plane Tracking

短语讲解：

1. But once the NEXT satellites are set up in 3 years, planes will be able to fly closer to each other.

set up 成立
例句：They have set up their owt hirepurchase subsidiaries.
他们建立起自己的租购子公司。

2. Airlines will then be able to save money on fuel.

be able to 能够; 能
例句：We must be able to stay impartial at all times.
我们必须经常保持公正的态度。

3. "That's unique now because it will be within eight seconds of when the last contact was made, the distances would have been narrowed down, in the case of MH370, if that was available at the time."

in the case of 在...情况下
例句：In the case of cotton processing, opening is necessary preliminary to cleaning.
在纺棉的情况下，开棉是除杂前必须的。
at the time 当时; 在那时
例句：At the time I had fully expected to find work before long.
那个时候我还一心盼望不久就可找到工作。