经济学人官方双语汇总
173页1、 经济学人官方双语汇总(15月)科技向3D打印技术Additive manufacturingA printed smile3D printing is coming of age as a manufacturing technique增材制造打印的笑容3D打印制造技术已渐成熟A SET of straight and gleaming teeth makes for a beautiful smile. But how many people who have undergone a little dental maintenance know that they may have inside their mouths some of the first products of a new industrial revolution? Tens of millions of dental crowns, bridges and orthodontic braces have now been produced with the help of additive manufactu
2、ring, popularly known as 3D printing. Forget the idea of hobbyists printing off small plastic trinkets at home. Industrial 3D printers, which can cost up to $1m, are changing manufacturing.一口整齐而闪亮的牙齿会让您的笑容更加美丽。但又有多少做过牙科治疗的人知道,新工业革命带来的第一批产品就在自己口中呢?如今,数以千万计的牙冠、牙桥和牙箍都是依靠增材制造,也就是俗称的3D打印生产出来的。别再觉得它只是爱好者在家里打印几个小塑料玩意了。价格可高达百万美金的工业3D打印机正在改变着制造业。The business of dentures shows how. For the metal bits in false teeth, dentists have long relied upon a process called “investment casting”. This involves creati
3、ng an individual model of a persons tooth, often in wax, enclosing it in a ceramic casing, melting out the wax and then pouring molten metal into the cavity left behind. When the cast is split open, the new metal tooth is removed. It is fiddly, labour-intensive and not always accurate; then again the casting method is some 5,000 years old.牙科行业就是一个明证。对于假牙中的金属件,牙医们长期以来都依靠一种名为“熔模铸造”的工艺。它要先做出患者的牙齿模型(一般是蜡制),封上陶瓷,再把蜡熔化后倒出,在其留下的空腔中注入熔融的金属。最后打开铸模,拿出新的金属牙齿。整个过程十分繁琐,相当辛苦而且并不总是很准确。再说,铸造法已经有5000年的历史了。Things
4、 are done differently at an industrial unit in Miskin, near Cardiff, set up by Renishaw, a British engineering company. The plant is equipped with three of the firms 3D printers; more will be added soon. Each machine produces a batch of more than 200 dental crowns and bridges from digital scans of patients teeth. The machines use a laser to steadily melt successive layers of a cobalt-chrome alloy powder into the required shapes. The process is a bit like watching paint dryit can take eight to te
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