2014英语四级听力练习慢速(8)
Drones are not get ready for widespread use. The sensor technology needed to prevent drones from crashing into things needs to be improved. They are also costly, and in most countries, drones or other aircraft can not be flown without special laws governing their use.
Opponents and supporters of drones do not agree on much, but they do agree that the technology is coming likely within the next 10 years. And they say Africa needs to be ready.
And that is the Technology Report from Learning English.
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