专业英语-例子.pptVIP

专 业 英 语Specialized English——科技英语翻译方法 例子 Metal cutting can be defined as a process during which the shape and dimensions of a workpiece are changed by removing some of ites material in the form of chips. 金属切削可以定义为通过除去工件的一些材料使其成为切屑的方法来改变工件的形状和尺寸的生产过程。 The latter are separated from the workpiece by means of a cutting tool, which must possess a very high hardness compared with that of the workpiece as well as certain geometic characteristics that depend upon the conditions of the cutting operation. 我们利用切削刀具将切屑与工件分开。刀具既要有比被加工工件高很多的硬度，又要又取决于切削条件的某种几何特性。 Cutting tools must possess certain mechanical properties in order to function adequately during the cutting operations. These properties include high hardness and the ability to retain it even at the elevated temperatures generated during cutting. They also include toughness, creep and abrasion resistance, and the ability to withstand high beraing pressures. 切削刀具必须具有一定的机械特性，以便在切削过程中充分实现它的功能。这些特性包括高硬度和在切削产生高温时仍能保持高硬度。机械特性还包括韧性、蠕变性、抗磨损能力和承受较高压力的能力。 Tn fact, cutting materials differ in the degree to which they possess each of those mechanical properies. Therefore, a cutting material is selected to suit the cutting conditions, such as the workpiece material, cutting speed, coolants used, and so on. 事实上切削刀具材料在具有以上机械特性的程度方面互不相同。因此我们选择的切削刀具材料必须符合切削条件，如工件材料、切削速度有、使用的冷却剂等等。 Instrumental drawing is divided, according to its various applications, into mechanical drawing, a general term for all engineering drafting; machine drawing, or the preparation of the working drawings for the construction of machinery; architectural drawing, ship drafting, and topographical drawing; and the various purely mathematical divisions of descriptive geometry. 按照其不同的应用领域，机械制图可划分为机械图（一个用于所有工程图的通用术语）、设备图（即用于设备制造的图）、建筑图、船舶图、地形图以及完全为投影几何的各种数学分解图等等。 In architectural drawing and in most forms of machine drawing and engineering, the purpose is to furnish diagrams of all parts of a structure or machine to be erected. These diagrams are drawn to e