Unit 5 Using languages 知識點(diǎn)學(xué)案-高中英語人教版（2019）選擇性必修第一冊

1、 高一英語 第 =page3 *2-15頁 (共4頁) 高一英語 第 =page3*2 6頁 (共4頁)Chemical Versus Organic Farming化學(xué)與有機(jī)農(nóng)業(yè)的比較Chemical pesticides and artificial fertilisers have been in wide spread use in farming since the middle of the 20th century. 自20世紀(jì)中葉以來，化學(xué)農(nóng)藥和人工肥料在農(nóng)業(yè)中得到了廣泛的應(yīng)用。When they were first introduced, many farmers welc

2、omed them as a great way to fight crop disease and increase production. 剛開始使用的時(shí)候，很多農(nóng)民都很歡迎，認(rèn)為這是防治作物病害和提高產(chǎn)量的好辦法。Over time, however, what some scientists have found is that their long-term use can sometimes harm both the land and peoples health.但隨著時(shí)間的推移，一些科學(xué)家發(fā)現(xiàn)，長期使用它們有時(shí)會損害土地和人們的健康。知識點(diǎn)：the middle ifa wa

3、y to do sth.For example, pesticides can damage the land by killing not only harmful bacteria and insects, but also helpful ones. 例如，農(nóng)藥不僅會殺死有害的細(xì)菌和昆蟲，還會殺死有益的細(xì)菌和昆蟲，從而破壞土地。In addition, these chemicals can stay in the soil and underground water sources for a long time. This affects the crops grown on the

4、 land and, in turn, the animals and humans who digest them. 此外，這些化學(xué)物質(zhì)會在土壤和地下水源中停留很長時(shí)間，這會影響到土地上種植的作物，進(jìn)而影響到消化這些作物的動物和人類。Many people worry that these chemicals may make them ill and even cause cancer. 很多人擔(dān)心這些化學(xué)物質(zhì)會讓他們生病，甚至致癌。 In fact, some pesticides like DDT have been prohibited in most countries becau

5、se of the damage they cause to people and the environment. 事實(shí)上，一些殺蟲劑，如DDT，由于對人和環(huán)境的破壞，大多數(shù)國家已經(jīng)禁止使用。As for chemical fertilisers, crops grown with them usually grow too fast to be rich in nutrition. 至于化肥，使用化肥種植的農(nóng)作物通常生長過快，營養(yǎng)不豐富。 They may look beautiful on the outside, but inside there is usually more wat

6、er than essential minerals, and they often have less flavour as well.雖然外表看起來比較美觀，但里面通常含有的水分更多而不是必需的礦物質(zhì)，而且它們的味道往往也較差。知識點(diǎn)：not only ,but alsoin additionin fact =as a matter of fact= actuallytoo.toas wellAs an alternative, some farmers have switched to organic farming, and many customers have turned to

7、organic food when they shop at the local grocery. 作為一種選擇，一些農(nóng)戶已經(jīng)改用有機(jī)耕作，許多顧客在當(dāng)?shù)仉s貨店購物時(shí)也轉(zhuǎn)而選擇有機(jī)食品。 Organic farming is simply farming without using any chemicals. 有機(jī)耕作就是不使用任何化學(xué)品的簡單耕作。Organic farmers focus on keeping their soil rich and free of disease through natural means. 有機(jī)農(nóng)戶專注于通過自然手段保持土壤肥沃和沒有病害。For ex

8、ample, many organic farmers use natural waste from animals as fertiliser. 例如，許多有機(jī)農(nóng)民使用動物的天然廢物作為肥料。 This makes the soil in their fields richer in minerals. It also keeps the air, soil, water, and crops free of chemicals.這使得他們田地里的土壤含有更豐富的礦物質(zhì)。它還能使空氣、土壤、水和農(nóng)作物不含化學(xué)物質(zhì)。Organic farmers also use many other met

9、hods to produce rich soil. 有機(jī)農(nóng)民還使用許多其他方法來培養(yǎng)肥沃的土壤。 They often change the kind of crop grown in each field every year. 他們經(jīng)常改變每年在每塊田里種植的作物種類。For instance, they may grow corn or wheat in a field one year, and then grow beans there the next. 例如，他們可能會在某塊田里種植玉米或小麥，然后在第二年種植豆類。Why different crops are grown i

10、s because they put important minerals back into the ground, making it ready for the next batch of crops. 為什么要種植不同的農(nóng)作物，是因?yàn)檫@么做可以把重要的礦物質(zhì)釋放回地里，讓它再次為下一批農(nóng)作物做好準(zhǔn)備。 Organic farmers also plant diverse crops that used different depths of soil to help keep it rich. 有機(jī)耕種的農(nóng)民還種植多樣化的作物，利用不同深度的土壤來幫助保持土壤的肥沃。 For exam

11、ple, peanuts grow on the grounds surface, but many other vegetables put down deep roots. 例如，花生生長在地表，但許多其他蔬菜卻把根扎得很深。 The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to peoples health.使用不同的有機(jī)耕作方法的目的是種植好的食物，同時(shí)避免對環(huán)境或人們的健康造成損害。知識點(diǎn)：ready

12、 forSome people would prefer to stop the use of man-made chemicals in agriculture entirely. 有些人希望在農(nóng)業(yè)中完全停止使用人造化學(xué)品。What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world. 阻止他們這樣做的原因是，化學(xué)農(nóng)業(yè)服務(wù)于全世界對食物的高需求。Organic farming is nowhere near able to mee

13、t that need. 有機(jī)農(nóng)業(yè)遠(yuǎn)遠(yuǎn)不能滿足這種需求。Therefore, there is still a long way to find a suitable solution that puts sufficient food on the dinner table while keeping people and the environment as healthy as possible.因此，要找到一個(gè)合適的解決方案，既能讓餐桌上有足夠的食物，又能讓人們和環(huán)境盡可能地保持健康，還有很長的路要走。知識點(diǎn):keep from asas possibleChemical Versus

14、 Organic FarmingChemical pesticides and artificial fertilisers have been in widespread use in farming since the middle of the 20th century. When they were 1 (one) introduced, many farmers welcomed them as a great way to fight crop disease and increase production. Over time, however, what some scient

15、ists have found is that their long-term use can sometimes harm both the land 2 peoples health.For example, pesticides can damage the land by killing not only 3 (harm) bacteria and insects, but also helpful ones. In addition, these chemicals can stay in the soil and underground water sources for a lo

16、ng time. This affects the crops grown on the land and, 4 turn, the animals and humans who digest them. Many people worry that these chemicals may make 5 ill and even cause cancer. In fact, some pesticides like DDT have been prohibited in most countries because of the damage they cause 6 people and t

17、he environment. As for chemical fertilisers, crops grown with them usually grow too fast 7 be rich in nutrition. They may look beautiful on the outside, but inside there is usually more water 8 essential minerals, and they often have less flavour as well.As 9 alternative, some farmers have switched

18、to organic farming, and many customers have turned to organic food when they shop at the local grocery. Organic farming is simply farming without using any chemicals. Organic farmers focus on 10 (keep) their soil rich and free of disease through natural 11 (mean). For example, many organic farmers u

19、se natural waste from animals as fertiliser. This makes the soil in their fields richer in minerals. It also keeps the air, soil, water, and crops free of chemicals.Organic farmers also use many other methods to produce rich soil. They often change the kind of crop grown in each field every year. Fo

20、r 12 (instant), they may grow corn or wheat in a field one year, and then grow beans there the next. 13 different crops are grown is because they put important minerals back into the ground, 14 (make) it ready for the next batch of crops. Organic farmers also plant diverse crops that used different 15 (depth) of soil to help keep it rich. For example, peanuts grow on the grounds surface, but many other vegetables put down deep roots. The goal of using different organic farming methods is 16 (grow) go