【正文】 ical example is… This can be illustrated by… The density of a soil is directly related to its bearing capability. The operator’s knowledge is mainly concerned with the hardware and not with the software. The experiment was designed to test the new drug. To find the required radio station, the tuner should be turned. The burning match is inverted, and as a result the flame bees bigger. This method is not fitted to the operation. The binary scale is perfectly used for the “offon” pulses of electricity. To some extent these methods are only applicable to long series of production. The density of air varies directly as the pressure, with temperature being constant. As the demand for power increases, the supply is proportionally increased. Air and fuel are mixed in a proportion of 15 to 1. Most objects are big in proportion to the size of an atom but small in proportion to the size of the sun.常見的表達(dá)分類的句型有：(break down 、 divide 、 subdivide 、 be classified)+ … （總體）+into/as …（部分）具體用法舉例如下：. . . . .英語科技論文常用句型結(jié)構(gòu) 表達(dá)不同功能的常用句型1）定義定義是對一事物的本質(zhì)特征或一個概念的內(nèi)涵與外延的確切簡要的說明，常見的表達(dá)方式和句型有：The term macromolecule(means … 、sinnifies ... is considered to be … 、is taken to be … 、refers to …)(In this article、In this paper、In this essay、In this context、In puter science、For this purpose) network (will be taken to mean … 、will be used in the 、will be considered to be …、will refer to … 、will be used in…)為了說明上述表達(dá)方式的用法，現(xiàn)舉例如下：Paradigm refers to models of inquiry that guides scientific work.在對某些事物進(jìn)行定義時，還可使用以下固定形式。 Classification breaks down the general topic into its related parts in a logical way. The ration between students of science to students of engineering is 3:2. Three colours: red, green and blue will, if they are mixed together in the right proportion, give us white light. A good coolant is formed by mixing water and soluble oil in a ratio of 10:1 to 20:1. The electric current varies directly with the voltage. Although both the planer and the shaper are adapted to the machining of flat surfaces, they differ widely in construction and in method of operation. This twobody approximation holds for the motion of planets about the sun. Rimmed steels are more suitable for drawing and forming. Gases and solids sometimes dissolve in liquids to form solutions, thereby forming solutions. This article aims at discussing new developments in ponent material and techniques. The experiment is intend to show that different materials conduct heat at different speeds.7）問題的相關(guān)性常見表達(dá)問題的相關(guān)性句型有：This is a problem(concerned with… 、 concerning… 、 related to… 、 relating to … 、bearing on … 、dealing with…) Inorganic chemistry is linked closely to geology, mineralogy, and metallurgy。 Units of mass and weigh are relative to/ relevant to the choice of a standard weight. A specific case can be provided to show… One example will suffice…9）狀態(tài)的轉(zhuǎn)換或變化常見表達(dá)狀態(tài)的轉(zhuǎn)換或變化句型有： (change 、transfer 、convert 、transform 、translate )…（變化前）(to、into) (變化后) A cam is used for transforming rotation motion into reciprocating motion.10）比較常見表達(dá)比較的短語有：as a parison, by parison, by contrast, in contrast, by way of contrast等。 By parison, very little is known about the internal structure of the earth.比較這個功能范疇所含的內(nèi)容，還可再細(xì)分為以下幾種小的類型：I. 區(qū)分 Hydraulic presses differ from mechanical presses in their way of functioning. For finishing electrodes, the foil thickness corresponds to the spark gap.IV．優(yōu)越于A (has 、 possesses advantage over B 、 offers)A優(yōu)越于B還可用以下句型表達(dá)： Gear shaping has certain advantages over other methods.V．相似 This curve bears little resemblance to a sine curve.11）故障 In most instances when the puter fails, it is due to human errorand is not the fault of the puter at all. If there should be a power broken down, the emergency generator is switched on.12）達(dá)到標(biāo)準(zhǔn)或程度 A high degree of accuracy can be achieved by coldworking the metal. Continuous sandmixers have also found their place in high production coremaking. Closedcircuit color TV did not e into use until very recently.14）符合標(biāo)準(zhǔn)或要求I．符合標(biāo)準(zhǔn) The instrument has been inspected and is in full conformity with the standard. The tenderer shall submit a basic tender which plies fully with the requirements of the tender documents. Control of the power output is achieved by varying the fuel supply. Electric generators convert the mechanical energy of rotation into electricity by way of magnetism. These hollow bodies are connected to each other in a detachable (reverse/violent) manner. Nonconformance is the failure of a unit of product to conform to (cover/fulfil/meet/satisfy) specified requirements for any quality characteristic.17）物體相對位置關(guān)系 This will tell the pilot the exact position of the building in (with) respect to the airplane.18）與……一致A be (patible 、 in conformity 、 consistent 、 in good agreement with B 、 in accord 、 in line 、 uniform)表達(dá)A與B一致還可用以下句型： The following examples illustrate the agreement of the rule with experiment. The noise coefficient corresponds roughly to calculations obtained on t