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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二层,第三层,第四层,第五层,*,Scientific English WritingSection,The verb 1.Special link verbs,在这种情况下机器容易发热。,In this case,machines get hot easily.,该皮带平压在滑轮（pulley）上。,The belt lies presses;rests flat on the pulley.,其结果证明是正确的。,Its result proves correct.,2.Semi-auxiliary verbs,最后提出了有待于解决的几个问题。,Finally,several problems which remain to be solved have been presented/are put forward/are given.,乍一看，这定律似乎与我们日常的经历相抵触。（contradict）,Assignment:Ex.1 II 6、7、8、10、11、12,Ex.2 II 14、16,IV,At first sight,this law seems to contradict our everyday experiences.,14.This coefficient,remains to be determined,.,16.Here we use two metal balls,two meters apart,.,The,primary winding of,a,transformer is the coil,which is fed with,an alternating current,and or:while the secondary winding is the coil,to which power is transferred,via the changing flux.The designations of the primary and the secondary,depends only on how the transformer is connected,;,either winding,may be the primary,and the other is then the secondary.,He was granted the title of“Expert with Extinguished Achievements”of both Shaanxi Province and the Ministry of Electronics Industry.He,is,a recipient of the Government Special Subsidy,.,He is engaged in the research in the fields of mobile communication,personal communication,and so on,He has obtained one“National Invention”patent and won quite a few,Science and Technology Progress Awards,at provincial and ministerial levels,.,Independent work 2,1、文革前，我校的学生数仅为现在的三分之一。,2、这台计算机所存储的信息是那台的三倍。,3、必须确定解出这个难题需要多长的时间。,Before the Cultural Revolution,the number of students in our university was only one-third what it is now.,This computer stores three times as much information as that one.,three times more information than,It is necessary to determine how long(a time)it takes to solve this difficult problem.,4.下面举几个例子以便于说明如何使用这个表达式。,5.这电路主要由五个元件构成的。,6.这压力只是由液体的重量产生的。(due to),Here are a few examples to show how this expression is used.,This circuit consists mainly of five components.,This pressure is due only to the weight of the liquid.,2 Requirement:The underlined part in each sentence must be expressed by a prepositional phrase.,1、,在这些（式子）中,，只有式（125）会引起问题。,2、,在我们讨论这一课题时,，我们将注意力限于其基本原理上。,3、,一旦加上合适的控制信号后,，该触发器（flip-flop）就将改变储存的信息。,Of these equations,only Eq.12.5 will cause problems.,In our discussion of this subject,we shall restrict our attention to its basic principles.,Upon the application of proper control signal,the flip-flop will change the stored information.,4、这缓冲器（buffer）能提供,4mA的,输出驱动电流。,5、我们,借助于电场（electric field）这一概念,描述电荷之间的相互作用。,6、现在必须从式（410）,求出t来,。,4、This buffer can supply an output drive current,of 4 mA,.,5、We describe interaction among charges,with the help of the concept of electric field,.,6、Now it is necessary to solve equation(4-10),for t,.,相距40cm的两本书静放在一张桌子上。,Two books,forty centimeters apart,lie stationary on a table.,These data will be sent to the computing center,three miles away,.,Before 1960,the standard of time was the interval of time between successive appearances of the sun,overhead,averaged over a year,and called the mean solar day.,现在计算机并不是什么神秘的东西了。,Now computers are not something mysterious.,There are many problems,both technological and financial,that remain to be solved.,每个物体，不论大小，都具有引力。,Every object,large or small,possess gravitation.,图5画出了两条10厘米长的平行线。,Figure 5 shows two parallels lines 10 cm long.,2.Functions of adjective phrase,大于任何数的一个量被称为无穷大。,A quantity,greater than any number,is called infinity.,所有这些方程都可以用类似于上面所述的方法来解。,All these equations can be solved in the way(by the method),similar to,that described above.,(1)as a post-modifier,perpendicular to,normal to,vertical to,parallel to,similar to,proportional to,adjective phrase as an adverbial,.The noun,1.A noun phrase expressing size may act as a post-modifier,这辆警车装备了一台砖头那么大小的袖珍接收机。,The police car is equipped with a portable receiver,the size of a brick,.,在这种情况下，必须对该设备进行,水冷却,。,In this case,it is necessary to,water cool,this device.,2.A single noun with a zero article acts as an adverbial.,过去，,长途电话,是靠接线员连接的。,Trunk calls,used to be operator connected.,3.Noun and preposition,n.+of+A+prep.+B,the effect of A on B,the superiority of A to B,the dependence of A on B,the definition of A as B,the exposure of A to B,这个力与该物体离地心的距离的平方成,反比,。,This force is,inversely proportional,to the square of,the distance of the body from the earths center,.,月亮对地球的引力引起潮汐。,The attraction of the moon for the earth causes the,tides,.,5.A long appositive to the subject is often put before the subject.,西安电子科技大学是全国重点大学之一，它创建于1931年。,One of the national key universities,XIDIAN university was founded in 1931.,An Ivy League university located in Philadelphia,Penn was founded by Benjamin Franklin and has been a pioneer in education and research for more than two hundred years.,A new technology introduced in the 1960s,laser can pierce the hardest substance such as diamond.,Assignment:,P.24 Ex.2 II-19,27,28,P.32 Ex.3 II-7,10,14,16,19,optional IV-1,2,
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