Though drones can be harmful, they can be very helpful.
尽管无人机可能有害，但它们也可能非常有用。
For example, people use drones to take photos or make videos.
例如，人们用无人机拍照或制作视频。
Some people think drones can only be used by governments to help when needed.
一些人认为只能由政府在需要的时候使用无人机提供帮助。
In some faraway places in the world, drones are the fastest way to send medicine to people who are in great need of it.
在世界上一些遥远的地方，无人机是把药品送到急需的人手中最快的方式。
Just like drones before them, miniature satellites are beginning to fundamentally transform our conceptions of who gets to do what up above our heads.
就像之前的无人机一样，微型卫星开始从根本上改变了我们的观念：谁能在我们的头顶上做什么。
Meanwhile, emerging technologies—the drones, 3D printers and smart-home devices of the world—now seem a bit too old to be called "the next big thing".
与此同时，新兴技术——无人机、3D打印机和智能家居设备——现在看起来太老了，不能称之为“下一件大事”。
In some people's opinions, can the drones only be used by governments at any time?
有些人想，无人机在任何时候都只能被政府使用吗？
When they are found by the drones, the police will warn them through the loudspeaker on the drone.
无人机发现他们时，警察可通过无人机上的扬声器对其发出警告。
Emerging technologies—the drones, 3D printers and smart-home devices of the world—now seem a bit too old to be called "the next big thing".
无人机、3D打印机和智能家居设备这类的新兴技术现在似乎有点太过时了，不能被称之为“下一件大事”。
West says that drones can be used for crop-dusting and tracking livestock.
韦斯特说，无人机可用于作物喷粉和追踪牲畜。
Pilotless drones can help fill the gap.
无人机能有助于填补该空缺。
Big drones are, however, hugely expensive.
然而，大型无人机非常昂贵。
These drones have special meaning for Singer.
在彼得·辛格的眼里，这些无人机有着特殊的意义。
It could also pass the information to other drones.
另外，无人机还会把信息传送给其它无人机。
The army needs more soldiers, helicopters and drones.
陆军需要加大兵力、增加直升机和无人驾驶机。
Some companies already manufacture sophisticated drones.
一些公司已经制造精密的无人机。
Already in the UK police are using drones to track thieves.
英国警察已经开始使用无人机追踪小偷。
But drones weren't at the heart of the Air Force's strategy.
但无人驾驶飞机并不是空军战略的核心。
The FAA has not approved the use of personal drones just yet.
联邦航空局(FAA)尚未批准私人使用无人机。
But he has some reservations about the widespread use of drones.
但是关于广泛使用无人机方面他有一些保留。
Small drones, by contrast, cost just tens of thousands of dollars.
与之对照，小型无人机的售价只有数万美元。
West says drones can be used for crop-dusting and tracking livestock.
韦斯特说无人机可用于作物除尘及家畜追踪。
The drones-for-hire market is also expanding into non-military fields.
无人机租赁市场也正在扩展到民用领域。
Fuel cells are also being used to power unmanned surveillance drones.
燃料电池还可以用在无人驾驶侦察机上。
The Air Force doesn't exactly want its drones powered by purple bacteria.
空军不是真的想用紫细菌来驱动无人机。
For now, the US and its Allies have the drones, but this monopoly will end.
目前，只有美国及其盟国拥有无人战机，但这种垄断终将结束。
It's likely that US sea-based drones will be deployed in the Pacific Ocean region.
很可能美国的海基无人机将部署在太平洋地区。
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