VOA慢速英语:Amazon Receives Patent for Drone Delivery System

短语讲解：

1. However, the Federal Aviation Administration, or FAA, is worried about security.

worry about 担忧， 烦恼;惦念;挂虑
例句：Don't worry about being late. It's fine.
别为迟到担心了 没有关系。

2. I think that they’re, they’re going to have to work on those in parallel with advancing the new technology.

in parallel with 与…平行，与…同时，与…并联
例句：The trees stand in parallel with the road.
这些树与公路平行。

3. “If you think of drone delivery perhaps to your rooftop, then you would have an opportunity to separate the pedestrian and the vehicular traffic, and at the same time separate it from air traffic.”

at the same time 同时; 一起;但是; 然而
例句：At the same time he joined an association.
在同一时期，他加入了一个团体。