Unit 6 的翻译
Unit 6 The Secret Life Of Science
3D printing technology first appeared in the US in 1980s. 3D printing is a process of making a three-dimensional solid object of virtually any shape from a digital model. It is achieved by using an additive process, where successive layers of material are laid down in different shapes. The technology is used for both prototyping (模型设计) and distributed manufacturing (分布式制造) in jewellery, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, medical industries, geographic information systems, civil engineering, and many other fields. In 2015, a 3D printing technology developed by Silicon Valley startup, Carbon3D Inc., enables objects to rise continuously from a liquid medium rather than being built layer by layer as they have been for the past 25 years, representing a fundamentally new approach to 3D printing. Futurologists believe that 3D printing signals the beginning of a third industrial revolution.
3D打印技术在20世纪80年代首次出现在美国。3D打印是按照数字模型打造任何形状的三维固体物件的过程。这是一个叠加过程，把材料层层覆盖，铸造出不同的形状。这项技术可用于产品的模型设计和分布式制造，能应用于珠宝、制鞋、工业设计、建筑、工程与施工、汽车制造、航空航天、医疗行业、地理信息系统、土木工程和其他诸多领域。2015年，美国硅谷的一家创业机构碳3D公司开发了一项3D打印技术，能让物体从液体介质中源源不断地生成出来，而不是像过去25年里那样，靠层层叠加塑造物体。这项技术为3D打印提供了一种全新的方法。未来学家认为，3D打印标志着第三次工业革命的开始。
2008年8月，中国第一条高铁"京津城际铁路"正式通车运营，宣告中国进入高铁时代。近年来，中国高铁不仅在关键技术领域取得一系列重大的创新与突破，还建立了具有自主知识产权、世界一流水平的高铁技术体系。凭借先进的技术、高性价比（cost effectiveness）和成功的运营经验，中国正在向世界各国大量出口高铁技术及相关产品。中国的高铁技术正在走向世界，对推动"一带一路"（Belt and Road Initiative）战略起到积极作用。
In August 2008, China's first high-speed railway, the Beijing-Tianjin Intercity Railway, was opened, ushering China into an era of high-speed railway. In recent years, in addition to achieving a series of major innovations and breakthroughs in key technologies, China has also developed a world-class high-speed railway technology system with independent intellectual property. With its advanced technology, cost-effectiveness and successful operating experiences in high-speed railway, China is witnessing an increasing export of its high-speed railway technologies and related products to many countries around the world. China's high-speed railway technology is finding its way in the world and is playing a positive role in promoting "the Belt and Road Initiative".
