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Today's cars are manufactured like this, a process that requires large amounts of energy and manpower.
如今的汽车制造就如同这样，需要耗费大量精力和人力。
But enthusiasts say very soon, building a mass-produced car may begin like this.
但狂热者称在不久的将来，制造一辆批量生产的汽车可以这么做。
You start with a digital file that you put into a printer and the printer prints out the rough shape of the car."
我们先将数字化文件放入打印机，打印机打印出汽车的大概模样。
For this prototype called Strati, manufactured by Arizona's Local Motors,
这辆模型叫做Strati，是由亚利桑那州的“当地汽车”公司生产，
granules of plastic reinforced with carbon fibers are melted and extruded in layers.
塑料颗粒通过碳纤维进行加固，之后进行融化，并一层层喷洒出来。
The process is still slow, but it is cheaper,
这一过程很漫长，但廉价，
requires less manpower and has a lower carbon footprint than today's conventional approach.
无需太多人力，它产生的碳足迹要少于如今的传统方法。
California-based Divergent Microfactories went a step further.
加州“多样微型工厂 ”公司想再进一步。
The body of its sports car, called Blade, is made of printed metal components,
该跑车的车身被叫做“刀片”，车身上的金属零件是打印出来的，
that can be assembled in minutes with connecting carbon-reinforced rods.
这些零件可以在几分钟之内组装完成，再加上连接的碳加固杆。
3D printing of metal radically changes that. By looking at 3D printing not for that overall structure
3D打印金属完全改变了它，整个构架不是通过3D打印的，
but to create individual modular structures that can be combined, that 3D printing transforms everything.
而是打印那些可以组合的模块结构，3D打印改变了这一切。
Powering 3D-printed cars with less polluting propulsion, such as electricity or natural gas,
让3D打印汽车拥有更环保的动力系统，比如电或天然气，
further reduces their carbon footprint. They are also lighter than regular cars.
从而进一步减少碳足迹，它比一般汽车要轻。
The 3D-printed chassis is only 102 pounds
3D打印汽车的底盘只有102磅，
and has the same strength and safety protection as a frame that would have been made out of steel.
它与钢架有着同样的强度和安全保护。
The first prototypes are often designed in the shape of sports vehicles.
首辆模型车通常都是跑车类型。
We focused a lot on the aesthetics of this car because it's very important to capture people's imaginations,
我们关注汽车的美观，从而启发人们的想象力，
particularly when we are talking about something is revolutionary, is the core enabling technology.
尤其是当我们谈论一些革命性的技术，比如核心创新技术。
Some 3D-printed cars, such as this Shelby Cobra, were built solely for testing purposes.
比如这辆眼镜蛇3D汽车，制作这辆车的唯一用途是测试。
Other designers say that mass production of their cars may start as soon as the next year.
其它设计师称批量生产最快明年开始。
They expect that sales will slowly pick up
他们预计销售将慢慢增长，
as more and more people recognize the many advantages of reinforced plastic bodies and advanced propulsion.
随着人们了解加强型塑料机身和先进的动力系统性能后。
George Putic VOA News, Washington.
VOA记者乔治·普提克华盛顿报道。
