硕士论文_科技英语文体特征探析(编辑修改稿)

硕士论文_科技英语文体特征探析(编辑修改稿)内容摘要：

accuracy and precision, on the other hand, pound sentences can not only enhance logic of a sentence but can shorten the length of the sentence. So plex sentences can not be avoided frequent using in EST stylistics. The author will elaborate on the frequent using of plex sentences in scientific English stylistics in the following section. This section, the author mainly analyzes the simple sentence and the parallelism sentence structures in the application of EST stylistics. 1 .Simple sentences. A simple sentence is defined as those sentences that have but one subjectpredicate structure, which constitutes the main part of one sentence. The authors, in this structure of this long sentence in EST ,tend to utilize a lot of adjectives, noun phrases, prepositional phrases, nonfinite forms of verbs and so on to modify the sentence. In the following the author uses an article as an example to illustrates the application of simple sentence： ―We use touch screens everywhere: tourist kiosks, automatic teller machines, pointofsale terminals, industrial controls. Half a dozen vendors, plus inhouse departments at major manufacturers, produced $800 million worth in 2020. The market is growing because the interfaces are easytouse, durable and Chapter One Syntax and Grammar of English for Science and Technology inexpensive. Touch screens employ one of three physics principles for detecting the point of touch. Pressing a “resistive” design with a finger or other stylus raises a voltage. In ―capacitive‖ models, a finger draws a minute current (this method is often used for cursor pads on notebook puters). In other designs, a finger or stylus interrupts a standing pattern of acoustic waves or infrared lights that blanket the surface. Resistive screens are the oldest, most widely used and least expensive, and they work with any stylus (finger, pen). Capacitive screens must be touched by a finger or an electrically grounded stylus to conduct current. Wave screens are the newest and most expensive. Surface acoustic wave screens must be touched by a finger or a soft stylus such as a pencil eraser to absorb energy。 infrare d screens work with any stylus. The different technologies may be used in the same applications, although pros and cons lead to prevalent binations: resistive screens for industrial controls and Palm Pilots。 capacitive screens for slot machines。 wave screens for ATMs and indoor kiosks. Most people are unaware of the type of screen they are using. But tricks can help you tell, according to Frank Shen of Elo TouchSystems in Fremont, Calif., the largest . maker. Push the screen lightly with your fingernail (not your skin). If it responds, it could be resistive or infrared. In this case, place two separated fingers against the screen at the same time. If the cursor moves beneath one finger, the unit is infrared (software registers the first touch)。 if the cursor moves between the fingers, it is resistive (the points are averaged). If the unit does not respond to your fingernail, again place two separated fingers against it. If the cursor moves beneath one finger, the unit is acoustic wave。 if the cursor moves between the fingers, it is capacitive.‖ In this passage ,the sentences marked in bold are the simple ones .In these sentences, adjectives, noun phrases, prepositional phrases, nonfinite forms of verbs are used many times to modify .Through plenty of investigations and studies, this kind of simple sentence structures in English for science and technology are often used to define for a thing or to explain some kind of phenomenon .The sentence structure is not plex, however, this sentence structure is difficult in a lot of modifiers .In one sentence ,it is more difficult to understand if there are more modifiers in it. parallelism sentence .The parallelism sentence is to structure the same or similar meaning consistent tone of three or more phrases or sentences and use. For example： ―Steadfast in our faith in the Almighty, we will advance toward a world where man39。 s freedom is secure. To that end we will devote our strength, our resources, and our firmness of resolve. With God39。 s help, the future of mankind will be assured in a world of justice, harmony, and peace.‖ Truman trinomial using object parallelism here called on the people of the United States contribute to human freedom, use object trinomial parallelism looking to the future of humanity. The meaning is: for this purpose, we will contribute our strength, resources, and determination. Under the bless of god, the future of mankind will no doubt is a world of justice, harmony and peace .Obviously , parallelism is a kind of rhetoric .A lot of researches indicate that the rhetorical devices are often used in EST stylistics to make articles persuasive .It increases the momentum of the language and makes some view more persuasive. Because these sentences are tidy and rhythmic ,they enhances the language rhythm, make the article look neat and easy. In English for science and technology 福建师范大学硕士论文 4 articles ,most contents of science and technology are boring. These long sentences can greatly increase the article‘s interests, and make involved contents more attractive to the reader. So this kind structure of long sentences in EST is more widely used . For example (1) Strawberries contain carotene which is one of synthetic fiber A39。 s important materials and has many beneficial effects such as improving eyesight and cal ming the liver .It contains pectin and is rich in dietary fiber ,which can help digestion. It has a certain nourishing effect on gastrointestinal and anemia. Besides preventing scurvy ,it has better effect on prevention and treatment of atherosclerosis, coronary heart disease . (2) The typical digital puter has five different units or sections ,an inpu。