lesson11Plastic剖析.ppt

Unit Five  Lesson11 Plastic;教学思路设计 时间分配（共100min）： 1.讲解课文中的专业词汇和术语； 2.讲解课后生词、大声朗读； 3.翻译课文，注意穿插相关专业知识； 4.分析难点句型，讲解相关语法和翻译技巧； 5.学生答疑。 ; Contents;Background Knowledge;New Words and Expressions;New Words and Expressions;New Words and Expressions;New Words and Expressions;难熔化的;Fillers Wood flour is the general-purpose and most commonly used filler. Cotton frock, produced from cotton linters, increases mechanical strength. For higher strength and resistance to impact, cotton cloth chopped into sections about 1/2inch square can be processed with the plastic. Asbestos fiber may be used as a filler for increased heat and fire resistance. Mica is used for molding plastic parts with superior dielectric characteristics. Nutshell flour is used instead of wood flour where a better finish is desired. ;Text ;Questions;Language Points Translating Techniques;Example 2: Asbestos fiber may be used as a filler for increased heat and fire resistance, and mica is used for molding plastic parts with superior dielectric characteristics. 用石棉纤维作为填料可以增强塑料的耐热性和耐火性，而用云母可使塑料件具有良好的电绝缘性能。 句中介词短语with superior dielectric characteristics作定语，修饰parts一词，可译为“具有优越的电绝缘性能”。 ; Example 3: Upon the application of initial heat the thermosetting plastics soften and melt, and under pressure they will fill every crevice of a mold cavity. 经过初步加热，热固性塑料软化和熔解，熔料在压力的作用下充满模具型腔。 在这里，upon 后面跟有表示动作的名词“application”,译为 “在…..以后或经过”。注意：在科技英语文体中，on 和upon 之后经常跟动名词或者表示动作的名词，一般译为”一……就和在…..之后”。;Example 4: 五、成分单译 有时，为使译文层次分明，简练明确，合乎汉语规范，有必要将原文中的较长句子成分分割翻译成单独的短句或短语。下面就几种技巧分述如下； （一）主语单译 将带有定语的主语单译成一个短句。 Lower temperature are associated with lower growth rates. 温度降低，生长速度就慢下来。 In welding too much current will make it virtually impossible to stay the deposited metal in the right place. 焊接时，电流过大，实际上就不可能使熔敷金属留在正确位置上。;（二）谓语单译 It goes without saying that oxygen is the most active element in the atmo