シャドーイング練習: We’re already using AI more than we realize - 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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Of all the interactions you have with technology in a day, interacting with artificial intelligence, or not, feels like a choice.
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But in some ways, it isn't.
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Over the past decade, we've become surrounded by AI systems that perceive our worlds, that support our decisions, and that mimic our ability to create.
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Whether we're aware of it or not is another story.
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Imagine a day like this.
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You do some exercise with a smartwatch, put on a suggested playlist, go to a friend's house and ring their camera doorbell, browse recommended shows on Netflix, check your spam folder for an email you've been waiting for,
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and when you can't find it, talk to a customer support chatbot.
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Each of those things are made possible by technologies that fall under the umbrella of artificial intelligence.
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But when a Pew survey asked Americans to identify whether each of those used AI or not, they only got it right about 60 % of the time.
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Some of these applications of AI have become fairly ubiquitous.
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They almost exist in the background and it's not terribly apparent to folks
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that the tools or services they're using are being powered by this technology.
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That's Alec Tyson, one of the researchers behind that Pew study.
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When Tyson and his team asked respondents how often they think they use AI, almost Most half didn't think they regularly interact with it at all.
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Some of them might be right, but most probably just don't know it.
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We know about 85 % of U .S adults are online every day, multiple times a day.
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Some folks are online almost all the time.
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This suggests a bit of a gap where there seem to be some folks who really must be interacting with AI, but it's not very salient to them.
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They don't perceive it.
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So why does that gap exist?
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Part of the problem is that the term artificial intelligence has been used to refer to a lot of different things.
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Artificial intelligence is totally this giant umbrella tent term that now has become a kitchen sink of everything.
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That's Karen Howe.
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She's a reporter who covers artificial intelligence and society.
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In the past, there were distinct disciplines about which aspect of the human brain do we want to recreate.
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Like, do we want to recreate the vision part?
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Do we want to recreate our ability to hear, our ability to write and speak?" Giving a machine the ability to see became the field of computer vision.
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Giving a machine the ability to write and speak became the field of natural language processing.
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But on their own, these tasks still required a machine to be programmed.
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If we wanted machines to recognize spam emails, we had to explicitly program them to look out for specific things, like poor spelling and urgent phrasing.
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That meant the tools weren't very adaptable to complex situations.
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But that all changed when we started recreating the brain's ability to learn.
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This became the subfield of machine learning, where computers are trained on massive amounts of data so
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that instead of needing to hand code rules about what to see or speak or write, the computers can develop rules on their own.
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With machine learning, a computer could learn to recognize new spam emails by reviewing thousands of existing emails
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that humans have labeled as spam.
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The machine recognizes patterns in this structured data and creates its own rules to help identify those patterns.
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When that training data hasn't been structured and labeled by humans, that method is called deep learning.
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Most of the time people talk about AI now, they're not talking about the whole field, but specifically these two methods.
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We'll hear more about that after a word from this video's sponsor.
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This episode is presented by Microsoft Copilot for Microsoft 365, your AI assistant at work.
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Copilot can help you solve your most complex problems at work, going far beyond simple questions and answers.
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From getting up to speed on a missed Teams meeting in seconds to helping you start a first draft faster in Word,
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Copilot for Microsoft 365 gives everyone an AI assistant at work in their most essential apps to unleash creativity,
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unlock productivity, and up -level skills.
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And it's all built on Microsoft's comprehensive approach to security, privacy, compliance, and responsible AI.
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Microsoft does not influence the editorial process of our videos, but they do help make videos like this possible.
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To learn more, you can go to Microsoft .com slash Copilot for Work.
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Now, back to our video.
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Improvements in computing power, together with the massive amounts of data generated on the internet, made possible a whole new generation of technologies that leveraged machine learning.
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And existing ones swapped out their algorithms for machine learning, too.
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A lot of the how in the back has been swapped into AI over time because people have realized,
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oh wait, we can actually get an even better performance of this product if we just swap our original algorithm,
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our original code, out for a deep learning model.
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Now, machine learning and deep learning models power recommendation for shows, music, videos.
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products, and advertisements.
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They determine the ranking of items every time we browse search results or social media feeds.
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They recognize images like faces to unlock phones or use filters, and the handwriting on remote deposit checks.
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They recognize speech in transcription, voice assistance, and voice -enabled TV remotes.
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And they predict text in auto -complete and auto -correct.
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But AI is seeping into more than that.
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There has been this tendency over the last 10 plus years where people have started putting AI into absolutely everything.
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Machine learning algorithms are already being used to decide which political ads we see, which jobs we qualify for, and whether we qualify for loans or government benefits,
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and often carry the same biases as the human decisions that preceded them.
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Are you actually automating the poor decision -making that happened in the past and just bringing it into the future?
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If you're going to use historical data to predict what's going to happen in the future, you're just going to end up with a future that looks like the past.
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And that's part of the reason why it matters to close
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that gap between those who knowingly interact with AI every day and those who don't quite know it yet.
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Awareness needs to grow for folks to be able to participate in some of these conversations about the moral and ethical boundaries, what AI should be used for and what it shouldn't be used for.
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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
この動画には、シャドーイング用の文が69文、単語が1096語あります。 音声の長さは6:21です。 話す速さは1分あたり約173語で、日常会話に近い自然なペースです。 単語の82%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 |
|---|---|---|
| artificial 形容詞 | /ˌɑː.tɪˈfɪʃ.əl/ | 人工の |
| interact 動詞 | /ɪn.təˈɹækt/ | 相互作用する, 相呼応する |
| spam 名詞 | /spæm/ | スパム, スパムメール |
| algorithm 名詞 | /ˈælɡəɹɪðm̩/ | アルゴリズム, 演算手順 |
| swap 動詞 | /ˈswɑp/ | 取り替える, 交換する |
| label 名詞 | /ˈleɪ.bəl/ | 荷札, 貼り札 |
| remote 形容詞 | /ɹəˈməʊt̞/ | 遠い, 遠隔な |
| predict 動詞 | /pɹɪˈdɪkt/ | 予言する |
| automobile 名詞 | /ˈɔː.tə.məˌbil/ | 自動車, 乗用車 |
| unlock 動詞 | /ʌnˈlɑk/ | 開ける, 解錠する |
| umbrella 名詞 | /ʌmˈbɹɛl.ə/ | 傘, 蝙蝠傘 |
| perceive 動詞 | /pɚˈsiv/ | 知覚する, 認める |
| browse 動詞 | /bɹaʊz/ | 閲覧する |
| moral 形容詞 | /ˈmoɹəl/ | 倫理的な |
| refer 動詞 | /ɹɪˈfɜː/ | 問い合わせる |
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 | we've become surrounded · have become · 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 | are made · being powered · be programmed |
注意したい発音
話し手はdon't, they're, you'reなど、短縮形や弱形を17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: algorithm /ˈælɡəɹɪðm̩/, ethical /ˈɛθɪkəl/
- 「sh」と「zh」の音: artificial /ˌɑː.tɪˈfɪʃ.əl/, interaction /ˌɪn.təˈɹæk.ʃən/, recommendation /ˌɹɛkəmɛnˈdeɪʃən/, transcription /tɹænˈskɹɪpʃən/, unleash /ʌnˈliʃ/
- 長い単語（アクセントの位置に注意）: artificial /ˌɑː.tɪˈfɪʃ.əl/, automobile /ˈɔː.tə.məˌbil/, participate /pɑːˈtɪs.ɪ.peɪt/, comprehensive /ˌkɑm.pɹəˈhɛn.sɪv/, interaction /ˌɪn.təˈɹæk.ʃən/
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。artificial, interact, spam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。