シャドーイング練習: Which Countries Will Win the 21st Century? - 動画で英語スピーキングを学ぶ
レッスンを作成中...
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After years studying economics and international trade, I've become convinced of one thing.
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Geography matters far more than most people realize.
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It doesn't determine everything, but it shapes trade,
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security, agriculture, industrialization, and influences which countries become wealthy and powerful.
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Over the next century, a handful of countries may be especially well positioned to rise because of it.
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Here are four I'd watch closely.
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Some might surprise you.
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Start with Vietnam.
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Vietnam has over 3,400 kilometers of coastline on the South China Sea, one of the most important trade corridors in the world.
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It has navigable river deltas in the north and the south.
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Its northern highlands are temperate.
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Its young population is large, better educated than its income level might suggest, and moving rapidly into cities.
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Vietnam's geography puts it at the natural crossroads of Southeast Asian trade.
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To its north, the largest manufacturing economy in the world.
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To its south, the Strait of Malacca and the entire Indian Ocean trade system.
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It sits, in other words, exactly where you'd want to be if you were designing a manufacturing export hub from scratch.
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And that is exactly what Vietnam is becoming.
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As global supply chains have started shifting away from China, driven by rising Chinese wages, geopolitical tension, and companies wanting to spread out their manufacturing,
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Vietnam has been the primary winner.
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Samsung manufactures over half of its global smartphone output there.
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Nike, Apple, Intel, LG, the list of companies that have moved significant production to Vietnam is long and growing.
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The country has grown at 6 to 7% per year for much of the last decade, and the geographic foundations supporting that growth aren't going anywhere.
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Vietnam is not without challenges.
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Its political structure, corruption, and infrastructure gaps are real.
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But its geographic fundamentals are as strong as any emerging economy on the planet.
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Now look at Poland.
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Poland sits on the Northern European Plain, the single most agriculturally productive and logistically central stretch of land in Europe.
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It has access to the Baltic Sea.
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It borders Germany, the largest economy in Europe, and sits directly between Western Europe and Ukraine,
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which is in the early stages of what will likely be a decades-long rebuilding project.
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Poland's geography has historically been a curse.
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Flat plains with no natural defensive barriers mean that when powerful neighbors want to invade, there's nothing to stop them.
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Poland was divided up three times in the 18th century and occupied by both Nazi Germany and Soviet Russia in the 20th.
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For roughly 150 years, Poland did not exist as an independent country at all.
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But that same flatness, the absence of mountains, the productive farmland, the river connections to the Baltic,
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makes Poland a natural logistics hub.
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And in the 21st century,
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as the EU's internal market has deepened and as Ukraine becomes a massive rebuilding project requiring Western goods and services,
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Poland's position has flipped from a geographic weakness into a strategic strength.
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Poland is now the fastest growing large economy in the European Union.
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Its GDP per capita has roughly tripled over the last 25 years.
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That is three times the wealth in a single generation.
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Major logistics companies, manufacturers, and technology firms have moved significant operations there.
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Warsaw is becoming a genuine European financial center.
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The same geography
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that made Poland to target for centuries is now making it
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an indispensable hub in the most important regional economic corridor in the world.
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Ethiopia is the most interesting and most uncertain case.
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The Ethiopian highlands are not well understood outside Africa, but they are one of the most geographically significant features on the continent.
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At elevations up to 4,500 meters, the highlands catch rainfall that the rest of northeast Africa never sees.
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The Blue Nile, which provides roughly 85% of the Nile's total flow, starts at Lake Tana in northwestern Ethiopia.
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This single fact means that Ethiopia controls the water supply for Sudan and Egypt,
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two countries with a combined population of over 130 million people.
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To put that another way, a country most people in the west couldn't find on a
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map without help controls the tap for one of the most geopolitically sensitive river basins on earth.
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The highlands also produce something that most of sub-Saharan Africa lacks.
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reliable rainfall, fertile volcanic soils, and cool enough temperatures to dramatically cut the tropical disease burden.
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The highlands are not as malarial as the lowland tropics.
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They are cooler, drier, and historically supported dense farming populations with real surplus,
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which is why Ethiopia is the oldest continuously existing state in Africa, with a civilizational history stretching back thousands of years.
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Ethiopia has a population of over 120 million people, the second largest in Africa.
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It has a young workforce, it sits at the crossroads of East African trade routes, and has access to the Red Sea through its relationships with Djibouti and Eritrea.
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If it can solve its political stability problems,
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and that is a very significant if given the devastating civil war from 2020 to 2022 in the Tigray region,
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it has the geographic building blocks to be a major emerging economy within a generation.
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The Grand Ethiopian Renaissance Dam, currently being filled on the Blue Nile, is itself a play on geographic leverage,
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using the country's highland water resources to generate hydroelectric power for industry.
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The question isn't whether the geography supports development, it clearly does.
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The question is whether the institutions can catch up with the geographic potential before conflict destroys the opportunity.
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And briefly, Indonesia.
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Indonesia is 17,000 islands straddling the Strait of Malacca, arguably the single most important shipping choke point on Earth.
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Every container ship moving between East Asia and Europe, every oil tanker moving from the Persian Gulf heading to China,
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passes through waters that Indonesia partially controls.
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The country sits at the meeting point of the Indian and Pacific Oceans,
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with economic zones stretching across some of the most strategically valuable sea territory in the world.
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Indonesia's fragmentation, all those islands, has historically held back economic and political unity.
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Managing a population of 270 million people spread across an archipelago
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roughly as wide as the continental United States is an administrative
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challenge of a completely different order than governing a country on a single landmass.
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Infrastructure costs are enormous.
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Political unity is constantly strained.
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But as sea trade becomes even more central to global commerce, Indonesia's geographic position becomes more valuable.
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It doesn't just sit near the Strait of Malacca.
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From a geopolitical perspective, it essentially is the Strait of Malacca.
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A country that can build the institutions to use that position, rather than simply being next to it,
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has the geographic assets to become one of the defining economies of the second half of this century.
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Geography doesn't determine everything, but it does determine what opportunities are available.
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And over the next century, these countries may have some of the strongest geographic advantages on Earth.
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But what do you think?
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Which country is most positioned to rise in the next few decades?
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And which one is being overlooked?
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If you want a deeper explanation of why geography shapes the rise and fall of countries,
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I made a longer video breaking down the full framework behind these examples.
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I'll link it here.
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The world has a structure.
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Let's keep finding it.
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このレッスンの語彙とスピーキングのポイント
このB2レベルのスピーキングレッスンは、動画「Which Countries Will Win the 21st Century?」を教材にしています。 繰り返し出てくる語は次のとおりです：geographic, geography, Poland, trade, highland。 この動画には、シャドーイング用の文が96文、単語が1207語あります。 音声の長さは8:38です。 話す速さは1分あたり約140語で安定しており、シャドーイングしやすいペースです。 英語の頻出3,000語に含まれる単語は75%だけなので、語彙は難しめです。
この動画の重要語彙
動画の中で特に難しい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| geographic 形容詞 | /d͡ʒiəˈɡɹæfɪk/ | 地理的 |
| geography 名詞 | /d͡ʒiˈɑɡɹəfi/ | 地理学 |
| historically 副詞 | /hɪˈstɔɹɪkli/ | 歴史的 |
| crossroads 名詞 | 十字路, 十字街 | |
| rainfall 名詞 | 降雨量, 雨量 | |
| logistics 名詞 | /ləˈd͡ʒɪstɪks/ | 物流, 運送 |
| corridor 名詞 | /ˈkɒɹɪdɔː/ | 廊下, 回廊 |
| emerge 動詞 | /ɪˈmɝd͡ʒ/ | 現れる |
| rebuild 動詞 | /ɹiːˈbɪld/ | 建て直す, 再建する |
| archipelago 名詞 | /ˌɑɹkəˈpɛləˌɡoʊ/ | 群島, 列島 |
| deepen 動詞 | /ˈdiːpən/ | 深める |
| devastate 動詞 | /ˈdɛv.ə.steɪt/ | 破壊する |
| farmland 名詞 | /ˈfɑːɹmlænd/ | 農地, 畑地 |
| industrialization 名詞 | /ɪnˌdʌstɹɪəlɪˈzeɪʃən/ | 産業化, 工業化 |
| landmass 名詞 | /ˈlænd.mæs/ | 陸地 |
この動画の文法
話し手がよく使っている文型を、動画の実際の表現とともに紹介します。
| 文型 | 動画での表現 |
|---|---|
| 現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している | I've become convinced · have started · has been |
| 受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる | was divided · being filled · being overlooked |
注意したい発音
話し手はdoesn't, aren't, couldn'tなど、短縮形や弱形を10回使っています。聞こえたとおりの短い形で発音しましょう。
- 「th」の音: northwestern /nɔːθˈwɛstn̩/, northeast /noːˈθɪjst/
- 「sh」と「zh」の音: fragmentation /ˌfɹæɡmənˈteɪ̯ʃən/, industrialization /ɪnˌdʌstɹɪəlɪˈzeɪʃən/, elevation /ˌɛlɪˈveɪʃn̩/, partially /ˈpɑɹʃəli/
- 長い単語（アクセントの位置に注意）: geography /d͡ʒiˈɑɡɹəfi/, historically /hɪˈstɔɹɪkli/, archipelago /ˌɑɹkəˈpɛləˌɡoʊ/, fragmentation /ˌfɹæɡmənˈteɪ̯ʃən/, hydroelectric /ˌhʌɪdrəʊɪˈlɛktrɪk/
日本語話者が苦手な音：
- /r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: historically /hɪˈstɔɹɪkli/, rebuild /ɹiːˈbɪld/, archipelago /ˌɑɹkəˈpɛləˌɡoʊ/, farmland /ˈfɑːɹmlænd/, hydroelectric /ˌhʌɪdrəʊɪˈlɛktrɪk/
- /v/ — /b/ にならないように、上の歯を下唇に当てる: devastate /ˈdɛv.ə.steɪt/, navigable /ˈnævɪɡəbəl/, overlook /ˈoʊ.vɚˌlʊk/, invade /ɪnˈveɪd/, govern /ˈɡʌv.ən/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: geographic /d͡ʒiəˈɡɹæfɪk/, geography /d͡ʒiˈɑɡɹəfi/, farmland /ˈfɑːɹmlænd/, flatness /ˈflætnəs/, fragmentation /ˌfɹæɡmənˈteɪ̯ʃən/
この動画での練習方法
- まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
- 通常の速度で一文ずつシャドーイングし、話し手のリズムに合うまで繰り返します。
- 自分の声を録音して元の音声と比べます。geographic, geography, historicallyなどの単語に特に注意しましょう。
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。