Grade 9 Unit 2 Topic 3 Section C

In many countries, people produce power from coal, but it is very dirty and causes acid ^[1]acid: US: [ˈæsɪd]   UK: [‘æsɪd]  n. 酸
adj. 酸的；酸性的；酸味的；尖刻的 rain. Some countries use nuclear energy to produce power. However, nuclear ^[2]nuclear: US: [ˈnukliər]  UK: [ˈnjuːkliə(r)] adj. 原子能的；核能的；核武器的；核子的 power can be very dangerous. To solve the energy problem, people all over the world are looking for new ways to produce power.

China is one of the first countries in the world to use biogas ^[3]biogas: US: [ˈbaɪoʊˌɡæs]  UK: [ˈbaɪəʊˌɡæs]  n. 沼气 technology ^[4]technology: US: [tekˈnɑlədʒi]  UK: [tekˈnɒlədʒi]  n. 工艺；科技；工程技术；工艺学. Farmers recycle straw ^[5]straw: US: [strɔ]  UK: [strɔː]  n. 稻草；一根禾秆（或麦秆、稻草）；（喝饮料用的）吸管, grass and animal waste to make biogas. This renewable ^[6]renewable: US: [rɪˈnuəb(ə)l]   UK: [rɪˈnjuːəb(ə)l]  adj. 可更新的；可再生的；可恢复的；可延长有效期的 energy is used in people’s everyday lives. Its key disadvantage ^[7]disadvantage: US: [ˌdɪsədˈvæntɪdʒ]  UK: [ˌdɪsədˈvɑːntɪdʒ]  n. 不利因素；障碍；不便之处 is that the process ^[8]process: US: [prəˈses]  UK: [ˈprəʊses]  n. 进程；流程；工序；工艺流程   v. 处理；加工；审核；数据处理 requires ^[9]require: US: [rɪˈkwaɪr]  UK: [rɪˈkwaɪə(r)]   v. 需要；依靠；依赖；使做（某事） a long time (up to ^[10]up to: 接近于；至多；多达 30 days) and the cost is high.

Electric ^[11]electric: US: [ɪˈlektrɪk]   UK: [ɪ’lektrɪk]  adj. 电的；用电的；电动的；发电的 vehicles were developed in the 1990s. On April 11, 2010, a new kind of electric vehicle named “Yezi” was shown in the 2010 Shanghai World Expo. It produces electricity from the sun, the wind and CO2. It can not only protect the environment but also save energy. It’s too small to ^[12]too… to … : 太…而不能… hold many people, but larger models will be developed in the near future ^[13]in the near future: 在不久的将来.

In China, the best-known ^[14]best-known:[‘best’nəun]   adj. 流传久远的，最有名的 maglev ^[15]maglev: US: [ˈmæɡlev]  UK: [‘mæglev]  n. 【物】磁悬浮 train is the German-built ^[16]German: US: [‘dʒɜrmən]  UK: [‘dʒɜː(r)mən]   n. 德国人；德语（德国、奥地利和瑞士部分地区的语言）  adj. 德国的 one in Shanghai. It takes people just 7 minutes to go to the airport 30 km away. ^[17]It takes sb. sometime to do sth. 做某事花费某人多长时间   *必会句型 The train can reach a top speed of 431 km per ^[18]per: US: [pɜr]  UK: [pɜː(r)]  prep. 每；每一 hour. It is quiet and quick. There is no wheel noise because there are no wheels ^[19]wheel: US: [hwil]   UK: [wiːl]  n. 轮；车轮；轮子；汽车. Maglev trains are very energy-efficient ^[20]efficient: US: [ɪˈfɪʃ(ə)nt] UK: [ɪ’fɪʃ(ə)nt]   adj. 效率高的；有功效的 and do not pollute the air. However, maglev guide ^[21]guide: US: [ɡaɪd]   UK: [ɡaɪd]  n. 指南；向导；导游；手册  v. 指导；指引；给某人领路（或导游）；阐明 paths ^[22]path: US: [pæθ]  UK: [pɑːθ]   n. 道路；小路；小径；路线 are much more expensive than traditional steel ^[23]steel: US: [stil]  UK: [stiːl]  n. 钢；钢铁工业；钢制磨刀棒；兵器 railways.

2a.

The sun, wind, waves ^[24]wave: US: [weɪv]   UK: [weɪv]  n. 波浪；波动；风潮；射流   v. 波动；挥；起伏；挥手[招手]示意 and heat from deep ^[25]deep: US: [dip]  UK: [diːp]  adj. 深的；厚的；纵深的；宽的  adv. 深深地；在深处；至深处 in the earth are energy sources ^[26]source: US: [sɔrs] UK: [sɔː(r)s]  n. 来源；源头；根源；原因.
They will never run out ^[27]run out: 耗尽；用光；过有效期；失效 so they are called renewable sources. In 2011, about 16% of energy used worldwide ^[28]worldwide: US: [ˈwɜrldˌwaɪd]   UK: [ˌwɜː(r)ldˈwaɪd]  adj. 影响全世界的；世界各地的  adv. 全球性地；世界范围地 came from renewable sources. The use of it is increasing rapidly each year.