シャドーイング練習: Learn English with VOA Special English - How to Make Your Own Solar Water Heater - YouTubeで英語スピーキングを学ぶ
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This is the VOA Special English Technology Report.
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This is the VOA Special English Technology Report.
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Solar water heaters are used around the world and are not very difficult to build.
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The system we are going to describe is based on a design developed some years ago in Afghanistan.
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Since then, it has been built and used in many countries.
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It can heat 70 liters of water to 60 degrees Celsius.
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It can do this between sunrise and noon on a clear day with an average air temperature of 32 degrees Celsius.
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There are two parts to the solar water heater.
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One part is made of a sheet of metal painted black.
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Black surfaces become hotter in the sun than surfaces painted any other color.
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This black metal plate is called a collector.
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The collector is placed in contact with the water.
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There are several kinds of metal sheets that can be used for the collector.
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Corrugated metal will work very well.
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Corrugated sheets are often used as roofs on housing.
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Once the water is heated, it is kept hot with insulation material.
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This allows the water to stay warm for a long time.
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The second part of the solar water heater holds the water for the system.
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This storage tank can be a container that holds about 100 liters.
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Two rubber pipes are attached to the water storage tank.
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One pipe lets water flow into the system.
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The other lets water flow out.
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When the water heater is working correctly, water will flow from the storage tank to the collector and back again.
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You can use the hot water at the top of the tank for washing and cleaning.
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You can change the flow of water so that the temperature is hot or warm as desired.
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This solar water heater is easy to build and operate.
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It will last about two years before the rubber pipes need to be replaced.
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There is also something else you will need to make the solar water heater work, the sun.
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As you might expect, the heater will heat water only on sunny days.
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You can get more information about solar water heaters and other projects from Enterprise Works VITA.
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This group works internationally to fight poverty.
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The website is EnterpriseWorks.org.
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Choose the link for news and resources,
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then click on publications for VOA Special English I'm Alex Villarreal to read and
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listen to more stories about technology and for English teaching activities go
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to VOA special English comm we're on Facebook Twitter and iTunes at VOA learning English
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Shadowing English
モバイルデバイスで利用できるようになりました。今すぐダウンロード！
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「Learn English with VOA Special English - How to Make Your Own Solar Water Heater」を使って、シャドーイングで英語を練習しましょう。
毎日15〜30分の練習で、IELTSスピーキングへの自信と実践的な英会話力が身につきます。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。