专业外语-信号与噪音 第8讲.pptVIP

Grammar Text Tour Vocabulary Text Tour Grammar : as的用法 Grammer : as的用法 Grammer : as的用法 Grammer : as的用法 Grammer : as的用法 Grammer: as的用法 Grammer: as的用法 Grammer : as的用法 Grammer : as的用法 Grammer: as的用法 Text Tour Paragraph 1 Vocabulary 英译汉（含公式的原理性叙述） 英译汉参考答案 Paragraph 3 Paragraph 4 Paragraph 5 Paragraph 6 Paragraph 7 小作文 * * Lecture 8 Signals and Noise (III) 英译汉 小作文 Grammar [例1] Radio, as the fastest and most reliable means of communication, is essential to modern science． (同位语) 无线电是最为快捷可靠的通信工具，在现代科学中不可或缺。 1．用做介词，构成介词短语，在句中做同位语、状语或补足语 [例2] Electrical power is always carried over long distances as a high-tension voltage at low-currents strength． (方式状语) 电力总是以高电压低电流的方式进行远距离输送。 electrical ?[i?lektrik?l] [例3] Maxwells equations simplify into a subject commonly referred to as geometrical optics，which treats light as a ray traveling on a straight line． (补足语) 麦克斯韦方程可简化为通常所说的几何光学，它将光视为在直线上传播的光线。 注：某些及物动词或带介词的动词常常要求as引出补足语，在科技英语中常见的这类动词有：assume，define，describe，consider, regard，know, refer to等。 [例4] The antenna gain becomes larger as frequency is increased in the microwave band． (时间) 在微波波段，天线增益随着频率的升高而增大。 2．用做连词引导状语从句 [例5] Marconi tried to commercialize radio at a much lower frequency for long-distance communications，but as he had a business interest in all of his work and developments, this was not a purely scientific endeavor．(原因) 马可尼试图以更低的频率实现长距离通信，并使之商品化，但由于他所有的工作都涉及到了商业利益，所以这不是纯科学追求。 antenna ?[?n?ten?] scientific ?[?sai?n?tifik] endeavor ?[in?dev?] [例6] Small as atoms are, electrons are still smaller． (让步) 原子虽然很小，但电子更小。 [例7] Just as not all systems are linear, not all linear systems are shift-invariant． (方式) 正如系统并非都是线性系统一样，线性系统并非都是时不变系统。 [例8] Electromagnetic waves travel as fast as light travels．(比较) 电磁波和光传播得一样快。 [例9] The electrical resistance of a body is constant only so long as its physical condition is unchanged． (条件) 只要物体的物理条件不变，其电阻就是恒定的。 electrical ?[i?lektrik?l] [例10] Compression, as the name implies, deals with techniques for