VOA慢速英语:Researchers at Virginia Tech Test Drones for FAA Rules

短语讲解：

1. Our first flight is going to be a larger aircraft that hasn't been flown unmanned in the national airspace."

be going to 要，会，将要; 就要; 快要
例句：It felt pleasant to be going to work. 
走上工作岗位是很愉快的。 

2. Pilots on the ground can use this view to better direct the drone and keep it away from objects in the flight path.

keep away from （使）不接近; 避开
例句：I want to keep away from the world while I am here. 
在此期间我要与世隔绝。 

3. Researcher Justin Stiltner says drones can be used to do jobs that are uninteresting, dirty or dangerous.

be used to 习惯于，适用于
例句：The stainless drum may be used to make larger batches. 
不锈钢转数设备可用来加工批量大的料。 

4. And that is not expected to happen until late 2015.

be expected to 被期待做某事; 有望做某事; 期许
例句：That could hardly be expected to last.
这很难预计将持续多久。