电气工程专业英语实用教程4.pptVIP

Unit 4 Basic Semiconductor Crystal Structure New Words And Phrases diode [5daiEud] n. 二极管 transistor [trAn5zistE] n. 晶体管 semiconductor [5semikEn5dQktE] n. 半导体 fabricate [5fAbrikeit] vt. 制作, 构成 Germanium [dVE:5meiniEm] n. 锗 physics types 物理类型，物理结构 Silicon [5silikEn] n.硅, 硅元素 fall in 属于 carbon family 碳族 oversimplify [5EuvE5simplifai] v.(使)过分地单纯化 New Words And Phrases dimensional [di5menFEnEl] adj. 空间的 adjacent [E5dVeisEnt] adj. 邻近的, 接近的 bond [bCnd] n. 结合(物), 粘结(剂), 联结v. 结合 covalent [kEu5veilEnt] adj.共有原子价的, 共价的 3-dimensional 三维的 tetrahedron [5tetrE5hedrEn] n. 四面体 pyramid [5pirEmid] n. 角锥、棱椎 New Words And Phrases ? crystal [5kristl] n. 晶体,水晶,结晶adj. 结晶状的 outer electron 外层电子 intrinsic [in5trinsik] adj. (指价值、性质)固有的,内在的,本质的 in spite of adv. 不管 impurity [im5pjuEriti] n. 杂质, 混杂物, 不洁, 不纯 N-type N 型 Arsenic [5B:sEnik] n. [化]砷, 砒霜 New Words And Phrases Phosphorus [5fCsfErEs] n. 磷 Periodic Table (元素)周期表 experimentation [eks7perimen5teiFEn]n.实验,试验,实验法 Gallium [5^AliEm] n. 镓 positive charge 正电荷 P-type P 型 Text请老师朗读并讲解课文Notes [1] While this is an oversimplified description, the nature of a bond between two silicon atoms is such that each atom provides one electron to share with the other. 本句中，while有“尽管”的意思。例如，While I understand what you say, I cant agree with you.虽然我理解你的意思，但我还是不同意。nature意为“性质，属性”。nature of a bond between silicon atoms指两个硅原子结合的性质。 Notes [2] To allow our silicon crystal to conduct electricity, we must find a way to allow some electrons to move from place to place within the crystal, in spite of the covalent bonds between atoms. 本句中，to allow our silicon crystal to conduct electricity是动词不定式短语做目的状语，to allow some electrons to move from place to place within the crystal 做定语，修饰a way ，in spite of表示“尽管有……”。 Notes [3] Because the resulting crystal has an excess of current-carrying electrons, each with a negative charge, it is known as N-type silicon. 本句中的resulting是“作为结果的、因而发生”的意思。因此理解这句话需