逻辑关系用于科技英语语篇段落的展开
逻辑关系用于科技语篇段落的展开
科技英语说明的是对事物的探寻、分析、和证实，寻求的是提供信息、澄清事情、定义事物、解释事物。其语篇完全可以用通常的逻辑关系手段达到目的，每种都是很好的段落展开手段。例如:
Clearly, with fewer but larger rods and cones we should e less distinctly. lf they were twice as broad tow points would be twice as far apart before we could distinguish them. lf their size reduced and number incread we should e no better.
在这个段落中，首句是主题句“少而大的视网膜杆和视锥让我们视力模糊”。第一个条件和结果关系说明视网膜杆和视锥如果宽大了给视觉带来的不利，第二个条件说明了它们变小而数量增多却增强了视力。作者利用两个条件向对段首主题展开说明。教师节英语作文
现场直播英文实际上，各种逻辑关系作为展开手段往往是多个同时使用。看下面的例子
belton>sada
dazzling>翻译专业>unionpayNoi may be defined,(义)as unwanted energy interfering with the reception of wanted signals. For example(例)noi makes a radio sound fuzzy, whereas (对照 "snow” appear in TV pictures.Noi falls into two groups:(分决)noi with external resources and noi created within the receiver.First(一)external noi is difficult to treat quantitatively and little can be done. Note radiotelescopes located away from industry(例) Second(另类)internal noi is quantifiable and reducible by receiver design.
成人用英语怎么说段中作者首先给出什么是噪声的定义，再用例证和对照等手段解释定义中提到的内容，展开说明。然后，使用分类的方法清晰告诉读者不同种类的噪声，再利用例证等手段分别对不同种类的噪声加以对照展开说明。
再从大的方面来讲，科技英语语篇也可以使用这些逻辑关系作为很好的段落间的展开手段。例如:在职法律硕士考试
Two lines of thought(分) are raid to say population problem can be solved without limitation ofnumbers. lt is argued that(-)using scientific methods could provide not only subsistence but anmproved living standard. This view is not shared by countries such as(
例)lndia. Population increa swallows up production increa. Thus(因果)the argument breaks down.Another argument(另一类is birth-rate falls with improved living standard. This argument also fails. Clearly voluntary controlmust be a big factor in the birth-rate decrea in Europe in the last 50 years(例i). Secondly(分类)with a very high living standard there are both motor-car and babies as in the USA(网iE)
in ca本例中，首先，用分类方法提出两类解决人口问题的想法，然后分别用两个段落并采用例证等方法展开说明，说明了“加强科技运用就能满足人口的资源需求，提高生活水平”和“提高了生活水平，人口出生率就会自然下降”这两种观点都是站不住脚的。
