Carcompanies already use 3D printers to make life-size models of car parts, and medical companies use the technology to make man-made body parts.
汽车公司已经在使用 3D 打印机制作真实大小的汽车零件模型，医疗公司也在使用这项技术制造人造身体部件。
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Cars powered by gasoline were sold for many years before hybrid vehicles that use gasoline, electricity, and solar energy. Carcompanies are now making cars that are fully powered by electricity only.