シャドーイング練習: Rust in 100 Seconds - 動画で英語スピーキングを学ぶ
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Rust, a memory-safe compiled programming language that delivers high-level simplicity with low-level performance.
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It's a popular choice for building systems where performance is absolutely critical, like game engines, databases, or operating systems,
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and is an excellent choice when targeting WebAssembly.
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It started as a side project of Gradon Whore in 2007, who named it after the Rust fungus.
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It was sponsored by Mozilla in 2009, and has been ranked the most loved programming language every year since 2016, with its fans being known as Rustations.
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Traditionally, high-level languages provide a garbage collector to nerf your control over memory management,
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while lower-level languages provide functions like Free and Allocate to shoot yourself in the foot.
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Rust takes a different approach.
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It has no garbage collector, but achieves memory safety with a concept known as ownership and borrowing.
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By default, every variable in Rust is immutable.
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This allows values to be used in the stack memory, which has minimal performance overhead.
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However, mutable values or objects with an unknown size at compile time are stored in the heap memory.
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Every value in a Rust program is assigned to a single variable known as its owner.
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When that variable goes out of scope, the memory allocated to it is dropped automatically.
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In some cases though, you may want to pass a reference to a different part of the program.
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Borrowing allows you to access a reference in memory without taking ownership of it.
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There are a ton of rules to go along with this system that the Rust BorrowChecker will validate at compile time.
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These rules keep your code safe while providing absolute control over performance.
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Rust also has a package manager called Cargo, where each individual package is a crate.
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To get started, install Rust, then run Cargo New from the command line.
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In the main.rs file, you'll find a main function, which is where the program will start executing.
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Declare a variable with let, followed by its name and type.
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The value can't be changed or reassigned by default, so add mutt to make it mutable.
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The name of the variable is the owner.
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A reference to its location in memory can be borrowed by other parts of the program by prefixing it with an ampersand.
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Then use a macro like println to log the value to the standard output.
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Rust also comes with a standard library that contains modules to handle I.O., the file system, concurrency, among many other things.
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Now compile your code to an executable with the Rust compiler.
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You just built a memory-safe executable that can handle the most performance-intensive system requirements.
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This has been Rust in 100 seconds.
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Hit the like button and subscribe if you want to see more short videos like this, and leave a comment if you want to see a full Rust tutorial.
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Thanks for watching, and I will see you in the next one.
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このレッスンについて
「Rust in 100 Seconds」を使って、シャドーイングで英語を練習しましょう。
毎日15〜30分の練習で、IELTSスピーキングへの自信と実践的な英会話力が身につきます。
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。