新概念英語文章及譯文

　　《新概念英語》自出版以來受到了英語學(xué)習(xí)者的熱烈歡迎。下面是學(xué)習(xí)啦小編帶來的新概念英語文章及譯文，歡迎閱讀!

　　新概念英語文章及譯文1

　　Statistics

　　統(tǒng)計(jì)學(xué)

　　There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of governmental units (states and statistics come from the same Latin root status) and a gentlemanly gambling father who relied on mathematics to increase his skill at playing the odds in games of chance. The influence of the mother on the offspring, statistics, is represented by counting, measuring, describing, tabulating, ordering, and the taking of censuses-all of which led to modern descriptive statistics. From the influence of the father came modern inferential statistics, which is based squarelyon theories of probability.

　　統(tǒng)計(jì)方法的早期發(fā)展受到兩種截然不同的影響。統(tǒng)計(jì)學(xué)有一個“母親”，她致力于井井有條地記錄政府機(jī)構(gòu)的文件(國家和統(tǒng)計(jì)學(xué)這兩個詞源于同一個拉丁語詞根，status)，還有一個有紳士般的賭博“父親”，他依靠數(shù)學(xué)來提高賭技，以便在幾率的游戲中取勝。“母親”對其子女統(tǒng)計(jì)學(xué)的影響表現(xiàn)在計(jì)數(shù)、測量、描述、制表、歸類和人口普查。所有這些導(dǎo)致了現(xiàn)代描述統(tǒng)計(jì)學(xué)的誕生。由于“父親”的影響則產(chǎn)生了完全基于概率論原理的現(xiàn)代推理統(tǒng)計(jì)學(xué)。

　　Descriptive statistics involves tabulating, depicting and describing collections of data. These data may bequantitative such as measures of height, intelligence or grade level -- variables that are characterized by an underlying continuum -- or the data may represent qualitative variables, such as sex, college major or personality type. Large masses of data must generally undergo a process of summarization or reduction before they are comprehensible. Descriptive statistics is a tool for describing or summarizing or reducing to comprehensible form the properties of an otherwise unwieldy mass of data.

　　描述統(tǒng)計(jì)學(xué)涉及對所收集數(shù)據(jù)的制表、制圖和描述。這些數(shù)據(jù)可以是數(shù)量性的數(shù)據(jù)，如高度、智商、或者是層級性的數(shù)據(jù)——具有連續(xù)性的變量——或數(shù)據(jù)也可以代表性質(zhì)變量，如性別、大學(xué)專業(yè)或性格類型等等。數(shù)量龐大的數(shù)據(jù)通常必須經(jīng)過概括或刪減的程序才能為人所理解。描述統(tǒng)計(jì)學(xué)就是這樣一個工具，它對極其龐雜的數(shù)據(jù)進(jìn)行描述、概括或刪減，使其變成能為人理解的東西。

　　Inferential statistics is a formalized body of methods for solving another class of problems that present great difficulties for the unaided human mind. This general class of problems characteristically involve attempts to make predictions using a sample of observations. For example, a school superintendent wishes to determine the proportion of children in a large school system who come to school without breakfast, have been vaccinated for flu, or whatever. Having a little knowledge of statistics, the superintendent would know that it is unnecessary and inefficient to question each child: the proportion for the entire district could be estimated fairly accurately from a sample of as few as 100 children. Thus, the purpose of inferential statistics is to predict or estimate characteristics of a population from a knowledge of the characteristics of only a sample of the population.

　　推理統(tǒng)計(jì)學(xué)是一套已定形了的方法體系，它解決的是光憑人腦極難解決的另一類問題。這類問題的顯著特點(diǎn)是試圖通過取樣調(diào)查來作出預(yù)測。例如，有一位教育督察想知道在一個龐大的學(xué)校系統(tǒng)中，不吃早飯就上學(xué)的學(xué)生、已經(jīng)做過防感冒免疫的學(xué)生，或其它任何類型的學(xué)生占多大比例。若具備一些統(tǒng)計(jì)學(xué)的知識，這位督察應(yīng)明白，詢問每個孩子是沒有必要而且沒有效率的，只要用100個孩子為樣本，他就可以相當(dāng)精確地得出這些孩子占整個學(xué)區(qū)的比例了。因此，推理統(tǒng)計(jì)學(xué)的目的就是通過了解一個群體中一些樣本的特性，從而對整個群體的特性進(jìn)行推測和估算。

　　新概念英語文章及譯文2

　　Coal-fired power plants

　　火力發(fā)電廠

　　The invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap,readily available fuel with which to generate large amounts of electric power. Coal seemed to fit the bill, and it fueled the earliest power stations (which were set up at the end of the nineteenth century by Edison himself). As more power plants were constructed throughout the country, the reliance on coal increased. Since the First World War, coal-fired power plants have accounted for about half of the electricity produced in the United States each year.

　　托馬斯·愛迪生1879年發(fā)明的白熾燈導(dǎo)致對便宜、易得、可生產(chǎn)大量電能的燃料的需求。煤似乎符合這個要求，并成為第一批電廠的燃料(正是愛迪生本人在19世紀(jì)末建造了第一批電廠)。 全國到處興建電廠時，對煤的依賴加深了。自第一次世界大戰(zhàn)以來，美國每年約有一半的電力是以煤為燃料的電廠提供的。

　　In 1986 such plants had a combined generating capacity of 289, 000 megawatts and consumed 83 percent of the nearly 900 million tons of coal mined in the country that year. Given the uncertainty in the future growth of nuclear power and in the supply of oil and natural gas, coal-fired power plants could well provide up to 70 percent of the electric power in the United States by the end of the century.

　　1986年這些電廠的總發(fā)電能力達(dá)到28,900千瓦并且消耗了當(dāng)年全國開采的九億噸煤的83%。 考慮到核能發(fā)展以及石油、天然氣供應(yīng)中的不確定因素，到本世紀(jì)末，火力發(fā)電廠仍可能為美國提供多達(dá)70%的電力。

　　Yet, in spite of the fact that coal has long been a source of electricity and may remain one for many years (coal represents about 80 percent of United States fossil-fuel reserves), it has actually never been the most desirablefossil fuel for power plants. Coal contains less energy per unit of weight than natural gas or oil; it is difficult to transport, and it is associated with a host of environmental issues, among them acid rain. Since the late 1960's problems of emission control and waste disposal have sharply reduced the appeal of coal-fired power plants. The cost of ameliorating these environmental problems along with the rising cost of building a facility as large and complex as a coal-fired power plant, have also made such plants less attractive from a purely economic perspective.

　　然而，盡管煤長期以來一直是電力的原料之一并且可能會繼續(xù)如此(煤占美國化石燃料儲量的80%)，它卻不是電廠的理想燃料。 煤的單位能量含量低于石油和天然氣，而且會導(dǎo)致包括酸雨在內(nèi)的一系列環(huán)境問題。 從1960年以來，排放控制和垃圾處理的問題極大地削弱了燃煤電廠的魅力。 由于減輕這些環(huán)境問題需要大量資金，而且建造龐大復(fù)雜的燃煤電廠的費(fèi)用不斷上漲，也使得這些電廠從經(jīng)濟(jì)角度上不具備吸引力。

　　Changes in the technological base of coal-fired power plants could restore their attractiveness, however. Whereas some of these changes are evolutionary and are intended mainly to increase the productivity of existing plants, completely new technologies for burning coal cleanly are also being developed.

　　改變火力發(fā)電廠的基礎(chǔ)技術(shù)卻可能恢復(fù)它們的吸引力。 雖然某些技術(shù)改進(jìn)是漸進(jìn)的，其目的只是提高現(xiàn)有電廠的生產(chǎn)率，但人們正在開發(fā)全新的清潔燃煤的技術(shù)。

　　新概念英語文章及譯文3

　　Obtaining Fresh water from icebergs

　　從冰山中獲取淡水

　　The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food.

　　把冰山拖到世界上人口稠密的地區(qū)和干旱地帶，再從中獲取淡水，這個想法曾一度被認(rèn)為是一個笑話，更適合于卡通畫，而非現(xiàn)實(shí)生活。然而現(xiàn)在，許多國家正相當(dāng)認(rèn)真地考慮這件事情，特別是在科學(xué)家們發(fā)出警告之后?？茖W(xué)家們認(rèn)為人類將在耗盡糧食之前首先耗盡淡水資源。

　　Glaciers are a possible source of fresh water that has been overlooked until recently. Three-quarters of the Earth's fresh water supply is still tied up in glacial ice, a reservoir of untapped fresh water so immense that it could sustain all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillionmetric tons of ice encased in 10000 icebergs that break away from the polar ice caps, more than ninety percent of them from Antarctica. Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year.

　　冰川是一個直到最近以前一直被忽視的可能的淡水源。全球四分之三的淡水還鎖在冰川的冰塊中。冰川就是一個蓄水池，其中未開發(fā)的淡水量是如此巨大，足夠支持全世界的江河1000年。每年有7,659萬億公噸冰漂流在海洋中。它們包含在10,000座從極地冰帽中斷裂出來的冰山中。這些冰山的90%以上來自南極。一年四季里，覆蓋在淺層大陸架上的巨大冰川生成了眾多冰山。

　　Icebergs are not like sea ice, which is formed when the sea itself freezes, rather, they are formed entirely on land, breaking off when glaciers spread over the sea. As they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean. To corral them and steer them to parts of the world where they are needed would not be too difficult.The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalinization, or removing salt from water.

　　冰山和海水的冰不同，后者是海水自身結(jié)冰形成的，而冰山則完全是在陸地上形成的。當(dāng)冰川伸展到海水中時，冰山就斷裂下來。當(dāng)漂離極地地區(qū)時，冰山有時會在底層洋流的推動下頗為神秘地逆風(fēng)移動。由于冰山比小塊的冰融化要慢，因此有的冰山在大西洋中向北飄到了赤道以南35°的地方。把冰山蓄攔起來并拖到世界上需要它們的地方將不會太困難。有困難的是其它的技術(shù)事宜。比如，如何防止冰山在較暖的氣候中迅速融化以及如何把大量的淡水收集到岸上去。但是，即便在拖的過程中冰山失去了一半體積，這樣做也遠(yuǎn)比從海水中脫鹽取得淡水便宜。