答案部分：
Section 1: 英譯漢
農(nóng)業(yè)的重要性怎樣強調(diào)都不為過。世界百分之五十以上的勞動力從事農(nóng)業(yè)。二十世紀八十年代初，農(nóng)業(yè)勞動力的比例在非洲高達百分之六十七，在北美洲則不足百分之五，在西歐約為百分之十六，在東歐和蘇聯(lián)約為百分之三十二，在亞洲則約為百分之六十八。
農(nóng)場規(guī)模因地而異，差別很大。直到最近，加拿大農(nóng)場的規(guī)模平均約為186公頃(約合460英畝)，美國農(nóng)場的規(guī)模約為175公頃(約合432英畝)。但在菲律賓，私人農(nóng)場的規(guī)模平均略少于3.6公頃(不足9英畝)，在印度尼西亞則略少于 1.2公頃(不足3英畝)。
農(nóng)場的規(guī)模還取決于其用途。大農(nóng)場通常從事商業(yè)耕種，或者說為賺錢而生產(chǎn)。拉丁美洲的大莊園就是大片的私有土地，雇人勞動。單一作物的種植園生產(chǎn)茶葉，橡膠或可可。生產(chǎn)小麥的農(nóng)場最有效益。它們擁有幾千公頃土地，雇傭一群群工人，并使用機器。澳大利亞牧羊場和其它畜牧場的規(guī)模一定要大到足以能為成千的牲畜提供充足的飼料。
零散的維持生計的個體農(nóng)場，或者說混合經(jīng)營的小規(guī)模家庭農(nóng)場，在發(fā)達國家已日漸減少，但在非洲和亞洲的發(fā)展中國家里仍大量存在。美國的“返回田地”運動扭轉(zhuǎn)了1970至1980這十年間新英格蘭和阿拉斯加小農(nóng)場衰敗的局面。
一個地區(qū)究竟生產(chǎn)什么取決于它的氣候、供水、地形和其它條件。
自有農(nóng)業(yè)以來的一萬多年中，各地的人們發(fā)現(xiàn)了野生動植物的食用價值，于是將其加以馴化或栽培，最重要的是谷物，如小麥、稻子、大麥，玉米和黑麥。
農(nóng)業(yè)收入還來自非糧食作物，如橡膠、纖維植物、煙草以及可用于生產(chǎn)化學合成品的油料作物。此外;還可通過飼養(yǎng)動物取其皮毛而獲利。
一個國家賺取的外匯，很大一部分可能來自某種單一的商品。例如，斯里蘭卡依靠茶葉，丹麥專門經(jīng)營奶制品，澳大利亞出口羊毛，新西蘭和阿根廷則出口肉類制品。在美國，近年來小麥已成為其賺取外匯的主要商品。
一個國家是否以出口農(nóng)產(chǎn)品為主取決于許多可變因素。其中一個因素就是這個國家的工業(yè)可能很不發(fā)達，無法生產(chǎn)足夠數(shù)量和技術(shù)先進的工業(yè)品。這類農(nóng)產(chǎn)品出口國包括加納，出口可可，還有緬甸，出口大米。另一方面，特別發(fā)達的國家可能生產(chǎn)過剩，大于本國人的需求，美國、加拿大和一部分西歐國家就是這種情況。
Section 2: 漢譯英
Tibet, located on the "Roof of the World", is still an underdeveloped area in China because of its harsh natural conditions and various social and historical restrictions formed by centuries of backward feudal serfdom. However, the development of Tibet in the past 50 years has greatly changed its former poor and backward look, and the Tibetan people's living standards have greatly improved. Social and economic development has enriched the people's material and cultural life remarkably. In 2000, people of various ethnic groups in Tibet basically shook off poverty, and had enough to eat and wear. Some of them began to live a better-off life. Along with the improvement in the people's livelihood, consumer goods such as refrigerators, color TV sets, washing machines, motorcycles and wristwatches have entered more and more ordinary homes. Many well-off farmers and herdsmen have built new houses. Some have even bought automobiles. Currently, Tibet ranks first in per-capita housing in the country. Radio, television, telecommunications, the Internet and other modem information transmission means are now part of daily life in Tibet. News about various parts of the country and the world now reach most people in Tibet by radio and TV. Local people can obtain information from and make contacts with other parts of the country and the world through telephone, telegram, fax or the Internet. The Tibetan people's health has also improved substantially, because the situation featuring a lack of both doctors and medicine has changed fundamentally. The average life expectancy of the Tibetan people has increased from 35.5 years in the 1950s to 67 years presently.
