文档介绍：Lecture 2 数词、介词数词1.“零点几”和“零点零几”等的表示方法:分子(numerator):a few(或several)分母(denominator):tenths,hundredths等该电阻上的电压为零点几伏。The voltage across the resistor is a few (或several) tenths of a volt. The voltage across ponent is a few tenths of a )上的电压(voltage)为零点几伏。。The internal resistance of this kind of storage battery is only internal resistance of this kind of storage battery is only a few thousandths of an :A /an +序数词+part分母:per或in a 或in +阿拉伯数字(Arabic numerals)百万分之三a third part in 1,000,000 a third part per million a third part in a “千分之几”、“万分之几”分子:基数词+part(s)分母:per或in a 或in +阿拉伯数字百万分之三3parts per million 3 parts in a million3 partsper 1,000,000练习其误差(error)为6/1012。Its error is 6 parts in 、分数+the+名词倍数、分数+that (of 短语)倍数、分数+what 从句This voltage is 80 times the signal applied to the speed is three tenths that speed is three times what it used to . 倍数、分数+the+名词该电路中的电流为电源(source)的短路电流(short-circuit current)的一半。The current in the circuit is _________ of the source. 、分数+that (of 短语)月球的质量为地球的1/ ___ of the moon is __________. 、分数+what 从句现在其内部的压力是原来的1/3。Now its internal pressure is . 倍数、分数+the+名词该电路中的电流为电源(source)的短路电流(short-circuit current)的一半。The current in the circuit is one half the short-circuit current of the source. 、分数+that (of 短语)月球的质量为地球的1/ mass of the moon is that of the earth. 、分数+what 从句现在其内部的压力是原来的1/3。Now its internal pressure is 1/3what it . 表示倍数增长This wire is five times longer than that 。这根导线是那根长度的5倍。N times +比较级=N times as +原级+asThe information stored in puter is four times more than the information in that stores four times more information than that one 。…之中Of these, the first chapter treatspulse and munications, the next covers radar, and the last one introduces :在这新的五章中,第一章论述负反馈的基本原