シャドーイング練習: React Native in 100 Seconds - 動画で英語スピーキングを学ぶ

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React Native.
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Write JavaScript and React to build apps for iOS, Android, and the web from a single code base.
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According to Atwood's law, any application that can be written in JavaScript will eventually be written in JavaScript.
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The first way JS developers tried to build mobile apps was
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by wrapping their native applications in a sandbox browser called a WebView, using tools like
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Apache Cordova and Adobe PhoneGap.
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The philosophy is write once, run anywhere.
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This works, but it can be hard to make a website feel like a true native experience.
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React Native takes a different approach.
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It feels just like
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React DOM for the web, but instead of using HTML and the DOM as building blocks for the UI,
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it uses the native components that you would find on iOS and Android.
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The philosophy is learn once, write anywhere.
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You can't just take your existing
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React web app and upload it to the App Store,
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but you can use the React skills you already have to build a native app without ever having to touch
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Java or Objective -C.
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Instead, you import building block components like button, switch, scroll view, and the most fundamental of which is view.
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At runtime, it will use the true native component on the corresponding platform, like UI view, Android dot view, or div on the web.
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It's like building three apps for the price of one, but in some cases, you may want a different visual experience based on the underlying OS.
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The platform module allows you to check which platform you're on and render different components accordingly.
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When it comes to visuals, there's no CSS in React Native.
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Instead, every core component takes a style prop that can be customized with a style sheet constructed from JavaScript.
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In development, it supports fast refresh, which means you can instantly see the changes you make to your code on any platform.
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You may also want to tap into native features like the device camera, push notifications, and geolocation.
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These concerns are handled by one of the most active open source communities on GitHub.
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There's open source packages for almost everything that can be installed with NPM just like any other JavaScript project, and there's frameworks like
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Expo that build on top of React Native Primitives to provide all the tooling required to ship your app to production.
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You can use
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React Native to build a complete mobile app or integrate it with existing iOS and Android projects.
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It's not an all -or -nothing solution.
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This has been React Native in 100 seconds.
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If you want to see more short videos like this, hit the like button and subscribe, and let me know if you want to see more
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React Native content in the comments.
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Thanks for watching, and I will see you in the next one.

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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「React Native in 100 Seconds」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：native, React, app, Javascript, component。 この動画には、シャドーイング用の文が35文、単語が473語あります。 音声の長さは2:17です。 話す速さは速く、1分あたり約208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。 英語の頻出3,000語に含まれる単語は79%だけなので、語彙は難しめです。

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
component 名詞/kəmˈpoʊ.nənt/部分
package 名詞/ˈpæk.ɪd͡ʒ/包み, パケット
skill 名詞/skɪl/腕, 技
sheet 名詞/ʃit/枚, シート
fundamental 形容詞/ˌfʌn.dəˈmɛn.təl/基本的な
framework 名詞/ˈfɹeɪm.wɜːk/骨組み
wrap 動詞/ɹæp/包む, 包装する
import 名詞/ˈɪm.pɔɹt/輸入品
subscribe 動詞/səbˈskɹaɪb/購読する
upload 動詞/ˈʌpˌloʊd/アップロードする
construct 動詞/ˈkɑn.stɹʌkt/建設する, 建てる
notification 名詞/ˌnoʊtɪfɪˈkeɪʃn̩/通知
module 名詞/ˈmɑd͡ʒul/モジュール
scroll 名詞/skɹoʊl/巻物, スクロール
refresh 動詞/ɹɪˈfɹɛʃ/爽やかにする

注意したい発音

  • 「sh」と「zh」の音: sheet /ʃit/, notification /ˌnoʊtɪfɪˈkeɪʃn̩/, refresh /ɹɪˈfɹɛʃ/
  • 長い単語（アクセントの位置に注意）: fundamental /ˌfʌn.dəˈmɛn.təl/, developer /dɪˈvɛləpɚ/, accordingly /əˈkɔɹ.dɪŋ.li/, notification /ˌnoʊtɪfɪˈkeɪʃn̩/

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: accordingly /əˈkɔɹ.dɪŋ.li/, scroll /skɹoʊl/
  • /v/ — /b/ にならないように、上の歯を下唇に当てる: developer /dɪˈvɛləpɚ/, java /ˈd͡ʒɑː.və/
  • /f/ — 「フ」ではなく、上の歯と下唇で出す: fundamental /ˌfʌn.dəˈmɛn.təl/, framework /ˈfɹeɪm.wɜːk/, notification /ˌnoʊtɪfɪˈkeɪʃn̩/, refresh /ɹɪˈfɹɛʃ/

この動画での練習方法

  1. 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。
  2. 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。
  3. 自分の声を録音して元の音声と比べます。component, package, skill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 →