シャドーイング練習: No, Really — Is A.I. a Bubble? | The Ezra Klein Show - 動画で英語スピーキングを学ぶ
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41 文
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1
Paul, make the case to me this is a bubble.
2
So in Western economic history, there have been like eight or nine of these moments where we build out some giant general purpose technology.
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And so we're building it out like we were the railroads, like we were electrification, like we were the canals, like we were the interstate highways.
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And every one of those moments has led to overbuild.
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There isn't a major economic CapEx episode in Western economic history that didn't end in a rolling series of crises,
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vastly inflated asset prices, and vast oversupply of capacity of whatever the thing was, right?
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Railroads, fiber, take your pick.
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Now, none of this is to say that like AI is frivolous
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or it doesn't work or that there aren't incredibly useful cases for it.
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That's not the point any more than that was the point for railroads, right?
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Railroads are incredibly useful.
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It didn't still end up where something like 50 % of the track miles ever laid turned out to be useless, right?
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So the bubble is this vast oversupply of something, largely fueled now by credit,
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which in turn will lead to massive business failures and write -down of assets.
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So all of this investment is at risk,
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and it's across the entire economy and sitting inside of all kinds of—but it's even sitting inside of your individual, your 401ks.
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So if you're holding an S &P 500 index, my friend, you are very, very long AI, right?
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Get out of my portfolio, Paul.
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Yeah, get that crap out of my portfolio.
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So you're very, very long AI.
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And this is the problem.
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Everything is leveraged to AI across every asset class, across all the retail investing.
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And then the last stat I'll give you, and the reason why
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that matters is we're at record percentages in terms of the percentage of people's net worth that are tied to equity.
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50 % of people's net worth is now in equity.
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So follow that math through.
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Most of equities is currently tech.
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Most of tech is currently AI.
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That's going to only get worse as these two monster IPOs come to market over the next, I don't know, two months or whatever.
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OpenAI and Anthropic?
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OpenAI and Anthropic.
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And just to put that in context, by the way, OpenAI, Anthropic, and SpaceX, if you want to include it,
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combined, those three IPOs are larger than all post -World War II IPOs combined.
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Like, this is a really unusual moment.
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That's a crazy stat.
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It's a crazy stat.
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And not only
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that, the combined value of those companies is larger than the value of the NASDAQ market capitalization at its peak.
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Like the bubble is sitting right in front of people and they want to say,
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well, I expect you to come with blonde hair, not brown hair.
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Dude, just because it doesn't look the way you want it to look doesn't make it any less fragile.
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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
このスピーキングレッスンは、動画「No, Really — Is A.I. a Bubble?」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：railroads, Anthropic, Ipos, Openai, stat。 この動画には、シャドーイング用の文が41文、単語が494語あります。 音声の長さは2:33です。 話す速さは速く、1分あたり約194語です。音のつながりや弱く発音される音が多くなります。 単語の83%は英語の頻出3,000語に含まれます。残りは練習の前に確認しておきましょう。
この動画の重要語彙
動画に出てくる覚えておきたい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| railroad 動詞 | /ˈɹeɪlɹoʊd/ | 鉄道輸送する |
| equity 名詞 | /ˈɛk.wɪ.ti/ | 衡平法 |
| asset 名詞 | /ˈæsɛt/ | 資産 |
| bubble 名詞 | /ˈbʌbəl/ | 泡 |
| combine 動詞 | /kəmˈbaɪn/ | 合わせる, 結び付ける |
| vast 形容詞 | /væst/ | 広大な, 莫大な |
| percentage 名詞 | /pə(ɹ)ˈsɛntɪd͡ʒ/ | 百分率, 百分比 |
| portfolio 名詞 | /pɔːtˈfəʊ.liˌəʊ/ | ポートフォリオ |
| unusual 形容詞 | /ʌnˈjuːʒ(u)əl/ | 珍しい |
| invest 動詞 | /ɪnˈvɛst/ | 投入する |
| canal 名詞 | /kəˈnæl/ | 運河, 水路 |
| mathematics 名詞 | /mæθ(.ə)ˈmæt.ɪks/ | 数学 |
| leverage 名詞 | /ˈlɛv.(ə.)ɹɪd͡ʒ/ | レバレッジ, レバ |
| fragile 形容詞 | /ˈfɹæd͡ʒəl/ | 壊れやすい, 脆い |
| blond 形容詞 | /blɑnd/ | 金髪の |
注意したい発音
話し手はdoesn't, didn't, we'reなど、短縮形や弱形を13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。
- 「sh」と「zh」の音: unusual /ʌnˈjuːʒ(u)əl/, capitalization /ˌkæpɪtəlaɪˈzeɪʃən/, electrification /ɪˈlɛktɹɪfɪkeɪʃən/
- 長い単語（アクセントの位置に注意）: incredibly /ɪŋˈkɹɛdɪbli/, portfolio /pɔːtˈfəʊ.liˌəʊ/, unusual /ʌnˈjuːʒ(u)əl/, mathematics /mæθ(.ə)ˈmæt.ɪks/, oversupply /əʊvəsəˈplʌɪ/
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: railroad /ˈɹeɪlɹoʊd/, incredibly /ɪŋˈkɹɛdɪbli/, leverage /ˈlɛv.(ə.)ɹɪd͡ʒ/, fragile /ˈfɹæd͡ʒəl/, electrification /ɪˈlɛktɹɪfɪkeɪʃən/
- /v/ — /b/ にならないように、上の歯を下唇に当てる: vast /væst/, invest /ɪnˈvɛst/, leverage /ˈlɛv.(ə.)ɹɪd͡ʒ/, vastly /ˈvæstli/, oversupply /əʊvəsəˈplʌɪ/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: portfolio /pɔːtˈfəʊ.liˌəʊ/, fiber /ˈfaɪ.bɚ/, fragile /ˈfɹæd͡ʒəl/, electrification /ɪˈlɛktɹɪfɪkeɪʃən/, frivolous /ˈfɹɪv.ə.ləs/
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。
- まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
- 自分の声を録音して元の音声と比べます。railroad, equity, asset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。