作业帮一篇关于《电的广泛使用》演讲稿,英文版本.
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一篇关于《电的广泛使用》演讲稿,英文版本.
就着重某一方面
就着重某一方面
Electricity is the most widely used type of energy in the world.We use it for work and for play,in the home and at work,(and at school).In the past it mainly provided us with light and heat.Over the years the number of electrically powered items has hugely increased.We now use it almost continually every day.We use it so much that we take it for granted.However,when there is a power cut we begin to realise just how much we need it and how dependent we have become on it.
Today,in most areas of the world,the majority of people still do not have access to electricity in their homes.The only places where electricity is universally installed are in Japan and a few other Asian countries,North America,Europe,and several other nations.However,even in these countries,the adoption of electricity in the household was a slow,gradual process.
When it was introduced in the 1880s,electricity was used almost exclusively for lighting.Many of the homes that were wired for electricity had no provisions for plugging in additional lights or appliances,even though appliances were offered for sale within a few years.In fact,there was no standard outlet or plug until the 1930s,and they still vary from country to country.Although electric heaters,ranges,and refrigerators were available in the 1920s or earlier,only the better off adopted them,in part because their installation required a major upgrade in wiring.
It was especially after World War II that the household use of electricity expanded.After this time,in the United States the housing codes (rules by which new houses have to be constructed) were changed to encourage the installation of more lights and outlets in every room,and special circuits for appliances such as refrigerators,washers,and ranges.Where most homes were wired to use no more than 60 amperes (amps) before 1945,most homes were equipped to use a maximum of 100 amp later.By about 1980,consumers were using so much electricity that the codes were revised again to specify a 200-amp service.
Today,the use of electricity in homes is so great that governments and utilities must promote conservation measures.Our refrigerators,heaters,and air conditioners use the most electricity in most households,followed by microwave ovens,televisions,computers,and washing machines.Electricity usage has almost completely displaced earlier sources of fuel for home lighting,such as oil and coal.In addition,our domestic use of electricity far exceeds our use of fuels such as propane and natural gas,which are widely used in houses,but only for heating and cooking.
Today,in most areas of the world,the majority of people still do not have access to electricity in their homes.The only places where electricity is universally installed are in Japan and a few other Asian countries,North America,Europe,and several other nations.However,even in these countries,the adoption of electricity in the household was a slow,gradual process.
When it was introduced in the 1880s,electricity was used almost exclusively for lighting.Many of the homes that were wired for electricity had no provisions for plugging in additional lights or appliances,even though appliances were offered for sale within a few years.In fact,there was no standard outlet or plug until the 1930s,and they still vary from country to country.Although electric heaters,ranges,and refrigerators were available in the 1920s or earlier,only the better off adopted them,in part because their installation required a major upgrade in wiring.
It was especially after World War II that the household use of electricity expanded.After this time,in the United States the housing codes (rules by which new houses have to be constructed) were changed to encourage the installation of more lights and outlets in every room,and special circuits for appliances such as refrigerators,washers,and ranges.Where most homes were wired to use no more than 60 amperes (amps) before 1945,most homes were equipped to use a maximum of 100 amp later.By about 1980,consumers were using so much electricity that the codes were revised again to specify a 200-amp service.
Today,the use of electricity in homes is so great that governments and utilities must promote conservation measures.Our refrigerators,heaters,and air conditioners use the most electricity in most households,followed by microwave ovens,televisions,computers,and washing machines.Electricity usage has almost completely displaced earlier sources of fuel for home lighting,such as oil and coal.In addition,our domestic use of electricity far exceeds our use of fuels such as propane and natural gas,which are widely used in houses,but only for heating and cooking.