シャドーイング練習: Walls and Moats Won't Save You. Innovation Will. - 動画で英語スピーキングを学ぶ

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1453. An army approaches Constantinople.

If you're inside the walls of Constantinople, you probably feel okay, because after all, those walls had stood for more than a thousand years.

There's a literal moat that goes around the city.

Once you get past the moat, you get to two sets of walls, each 18 feet thick.

Those walls were impenetrable before.

Saltpeter, sulfur, charcoal, Three ingredients that, when combined in the right way, created gunpowder.

First identified in about 142.

1 ,300 years later, a mysterious figure named Orban appears.

He goes to the people inside the walls, the Byzantine Empire, and says, I can sell you something that will protect your city.

The Byzantine Empire passes.

Orban goes to the Ottoman Empire that is seeking to sack the city and makes the same proposition they say yes.

Imagine how it felt.

Walls

that had stood for a thousand years faced the onslaught of a half -ton cannonball flung over the distance of a mile.

The wall shattered.

The city fell in 47 days.

Disruption changes everything.

The question you have to ask in modern times is what is the moat

that we have that we built yesterday that might protect us today but will be powerless against the disruptions in the future.

Why is it that market leaders pass on disruptive innovations?

Well, when you first see a disruptive innovation, it looks really different.

It looks unfamiliar and therefore it's pretty easy to discount it.

If you're inside walls that had stood for a thousand years and you see this unproven cannon present in front of you,

you don't fully understand it.

You don't fully see its use.

You're used to horses.

You're used to cavalry.

You're used to arrows.

Those are things that had worked for a very long period of time.

It's only once you see the full demonstration of the power of the disruption that you really, truly get it.

Why historically have disruptive innovations tended to start with upstarts?

Well, Bob Dylan put it pretty well, when you ain't got nothing, you got nothing to lose.

A market leader sees downside.

They see risks.

They see threats.

Somebody who is an upstart sees nothing but gain and possibility.

So therefore, it's pretty natural that an upstart will go and gravitate to following a new disruptive approach.

And the research shows that's a smart thing to do.

If you try to take on the incumbent in a battle

that they are used to playing and you try to do it better, they're going to beat you most of the time.

Clay Christensen called that a sustaining innovation battle.

If you try to take them on with a very different form of battle, you've got a much greater chance of winning.

So it's natural that if you don't go and counteract these forces, the upstart's going to see it and jump all over it.

The incumbent's going to hesitate and pause.

When you look at a new innovation, it always feels like there's risk involved.

So you have to make a decision.

Am I going to put a dollar, euro, rupee, whatever, into this innovation or that innovation?

One of the big challenges a market leader has is a comparison.

Should I spend that unit of resource making today better or should I spend it making tomorrow different?

If you're a company that's got nothing, you only think about what do I do that's going to have the maximum impact.

You look for the most exciting things, the things with the most potential.

Your resources naturally allocate towards the disruption.

This is the rational part of the innovator's dilemma.

Left unchecked, the resource allocation process inside an organization will direct everything to the known,

to the proven, to the things that appear to be safe, not recognizing that you're actually taking a risk by not taking a risk,

by leaving yourself susceptible to somebody who comes at you with a disruptive innovation.

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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「Walls and Moats Won't Save You. Innovation Will」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：innovation, walls, disruptive, disruption, risk。この動画には、シャドーイング用の文が51文、単語が656語あります。音声の長さは4:12です。話す速さは1分あたり約156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
innovation 名詞	/ˌɪn.əˈveɪ.ʃən/	イノベーション, 革新
resource 名詞	/ɹɪˈzɔːs/	資源, 資産
naturally 副詞	/ˈnæt͡ʃ.(ə.)ɹə.li/	勿論
thick 形容詞	/θɪk/	太い, 厚い
discount 名詞	/ˈdɪskaʊnt/	割引, 値引き
clay 名詞	/kleɪ/	粘土
mysterious 形容詞	/mɪˈstɪɹi.əs/	神秘的な, ミステリアスな
arrow 名詞	/ˈæɹəʊ/	矢
combine 動詞	/kəmˈbaɪn/	合わせる, 結び付ける
canon 名詞	/ˈkæn.ən/	正史
euro 名詞	/ˈjʊɹoʊ/	ユーロ
historically 副詞	/hɪˈstɔɹɪkli/	歴史的
demonstration 名詞	/dɛmənˈstɹeɪʃən/	実証
rational 形容詞	/ˈɹæʃ(ə)nəl/	合理的
pause 名詞	/pɔːz/	休止, 中断

注意したい発音

話し手はyou're, don't, ain't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: innovation /ˌɪn.əˈveɪ.ʃən/, disruption /dɪsˈɹʌpʃən/, demonstration /dɛmənˈstɹeɪʃən/, rational /ˈɹæʃ(ə)nəl/, proposition /ˌpɹɑpəˈzɪʃən/
長い単語（アクセントの位置に注意）: innovation /ˌɪn.əˈveɪ.ʃən/, naturally /ˈnæt͡ʃ.(ə.)ɹə.li/, mysterious /mɪˈstɪɹi.əs/, historically /hɪˈstɔɹɪkli/, demonstration /dɛmənˈstɹeɪʃən/

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: naturally /ˈnæt͡ʃ.(ə.)ɹə.li/, historically /hɪˈstɔɹɪkli/, rational /ˈɹæʃ(ə)nəl/, cavalry /ˈkæ.vəl.ɹi/, literal /ˈlɪt(ə)ɹəl/
/v/ — /b/ にならないように、上の歯を下唇に当てる: innovation /ˌɪn.əˈveɪ.ʃən/, cavalry /ˈkæ.vəl.ɹi/, disruptive /dɪsˈɹʌptɪv/, gravitate /ˈɡɹævɪteɪt/
/f/ — 「フ」ではなく、上の歯と下唇で出す: unfamiliar /ˌʌnfəˈmɪli.ə(ɹ)/, fling /ˈflɪŋ/, sulfur /ˈsʌl.fə/

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。innovation, resource, naturally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。

シャドーイングのやり方: ステップ別の完全ガイドを読む →

シャドーイング練習: Walls and Moats Won't Save You. Innovation Will. - 動画で英語スピーキングを学ぶ

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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

この動画の重要語彙

注意したい発音

この動画での練習方法

シャドーイングとは？英語上達に効果的な理由