求翻译：随着科学的发展和技术的进步，高速切削在航空航天，汽车和摩托车，模具等机械制造工业的金属加工领域得以迅速发展，在某种程度上彻底改变了金属切削的状况，大大提高了金属切削的效率和表面加工精度。本课题的数控龙门铣床是当今加工大型零件的主要机床之一。是什么意思？

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With the development of science and technology advances, high-speed cutting in aviation and aerospace, automotive and motorcycle, mold, and the metal-working machinery manufacturing industry is growing rapidly, and to a certain extent on the condition of the metal-cutting, have greatly increased the

Along with the science development and the technical progress, the high-speed cutting in the aerospace, the automobile and the motorcycle, the mold and so on the machine manufacture industry metal working domain can develop rapidly, completely changed the metal cutting condition to a certain extent,

With the progress of the development of science and technology, high speed cutting in the aerospace, automobile and motorcycle, mold and other metal processing machinery manufacturing industry to the rapid development in the area, to a certain extent has revolutionized metal cutting conditions, sign

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