シャドーイング練習: Can you solve the world’s most evil wizard riddle? - Dan Finkel - YouTubeで英語スピーキングを学ぶ
C1
The Evil Wizard Moldavort has been trying to kill you for years,
⏸ 一時停止中
再生速度:
すべての文77 文
文が短すぎたり長すぎる場合は、Editをタップして調整してください。
1
The Evil Wizard Moldavort has been trying to kill you for years,
2
and today it looks like he's going to succeed.
3
But your friends are on their way,
4
and if you can survive until they arrive,
5
they should be able to help stop him.
6
The Evil Wizard's protective charms ward off every spell you know,
7
so in an act of desperation,
8
You throw the only object in reach at him, Pythagoras's cursed chessboard.
9
It works, but with a catch.
10
Moldavort starts in one corner of the 5x5 board.
11
You have a few minutes to choose four distinct positive whole numbers.
12
Moldavort gets to say one of them,
13
and if you can pick a square on the board whose center is exactly that distance away,
14
the curse will force him to move to that spot.
15
Then he'll have to choose any of the four numbers,
16
and the process repeats until you can't keep him inside the board with legal moves.
17
Then he'll break free of the spell and almost certainly kill you.
18
What four numbers can you choose to keep Moldavort trapped by your spell long enough for help to arrive?
19
And what's your strategy?
20
The trick here is to keep Moldavort where you want him.
21
And one way to figure out how to do that is to play out the game as Moldavort would,
22
always trying to escape.
23
You're dealing with a relatively small board,
24
so the numbers can't be too big.
25
Let's start by trying 1,
26
2, 3, 4 to see what happens.
27
Moldevort could escape those numbers in just three moves.
28
By saying 2, then 3,
29
he would force you to let him into one of the middle points of the grid,
30
and then a 4 would break him free.
31
But that means you'll need to allow a number larger than 4,
32
which is the distance from one end of a row to another.
33
How is that even possible?
34
through diagonal moves.
35
There are, in fact, points that are distance 5 from each other,
36
which we know thanks to the Pythagorean theorem.
37
That states that the squares of the sides of a right triangle add up to the square of its hypotenuse.
38
One of the most famous Pythagorean triples is 3,
39
4, 5, and that triangle is hiding all over your chessboard.
40
So if Moldavort was here and he said five,
41
you could move him to these spaces.
42
There's another insight that will help.
43
The board is very symmetrical.
44
If Moldavort is in a corner,
45
it doesn't really matter to you which corner it is.
46
So we can think of the corners as being functionally the same,
47
and color them all blue.
48
Similarly, the spaces neighboring the corners behave the same as each other,
49
and will make them red.
50
Finally, the midpoints of the sides are a third type,
51
so instead of having to develop a strategy for each of the 16 spaces on the outside of the board,
52
we can reduce the problem to just three.
53
Meanwhile, all the inside spaces are bad for us,
54
because if Moldavort ever reaches one,
55
he'll be able to say any number larger than three and go free.
56
Orange spaces are trouble too,
57
since any number except 1,
58
2, or 4 would take him to an inside space,
59
or off the board.
60
So orange is out, and you'll need to keep him on blue and red.
61
That means 2 is bad,
62
since it could take Moldevort to orange on the first turn.
63
But the four other smallest numbers,
64
1, 3, 4, and 5, might work.
65
Let's try them and see what happens.
66
If Moldavort says one, you can make him go from blue to red or red to blue.
67
And the same works if he says three.
68
Thanks to our diagonals, this is even true if he says five.
69
If he says four,
70
you can keep him on the color he's already on by moving the length of a row or column.
71
So, these four numbers work.
72
Even if your friends don't get here right away,
73
you'll be able to keep the world's most evil wizard contained for as long as you need.
74
to learn more about the scientific know-how,
75
Brilliant has tools and resources for you.
76
Visit brilliant.org slash TED-Ed to try it out.
77
As a bonus, the first 833 of you to use that link will receive 20% off the annual premium subscription fee.
アプリをダウンロード
話したすべての文をAIが採点
TRENDING
人気動画
App StoreとGoogle Playで4.9/5
Shadowing English
モバイル版
Shadowing Englishアプリでいつでもどこでも英語を学びましょう。 今すぐコミュニケーションスキルを向上させましょう！
学習の進捗を追跡する
AIによる採点とエラー修正
豊富な動画ライブラリ
背景とコンテキスト
今回のビデオでは、魔法使いモルデヴォートとの知恵比べが展開されます。彼は五年間あなたを狙ってきた悪の魔法使いで、今回はかなり危険な状況に置かれています。モルデヴォートは、5x5のチェス盤の角にいるため、あなたは彼を捕まえるための4つの異なる正の整数を選ぶ必要があります。このシナリオを利用することで、英語を学びながら論理的思考力を養うことができます。このビデオを通じて、英語スピーキング練習の重要性と楽しさを感じてみてください。
日常コミュニケーションのための5つのフレーズ
- Can you help me?（手伝ってくれますか？）- 助けを求めるときによく使います。
- What do you think?（どう思いますか？）- 意見を尋ねる際に便利です。
- Let’s figure it out together.（一緒に解決しましょう。）- 問題解決に取り組む姿勢を示します。
- I need some time.（少し時間が必要です。）- 考える時間を求めるときに役立ちます。
- I’m not sure yet.（まだ確信がありません。）- 確信がない時に使います。
ステップバイステップ シャドーイングガイド
このビデオの難しさに取り組むために、シャドーイングのテクニックを使用しましょう。最初に、ビデオを視聴してモルデヴォートのストーリーを理解します。その後、以下のステップを試してみてください。
- ビデオを何度も再生し、内容を把握します。
- フレーズを一文ずつリピートし、発音やリズムを確認します。
- シャドーイングを行い、声を出して発音練習します。モルデヴォートの台詞を真似して、言い回しを覚えましょう。
- 意図的に数回繰り返し、自分自身のスピードでスクリプトを声に出します。
- 最後に、ビデオを見ながら自分の進歩を確認し、英語スピーキング練習の一環として次のフレーズに進んでください。
このように、YouTubeで英語学習をする際は、具体的な文脈の中で覚えたフレーズを使うことで、より効果的に英語を習得できます。shadow speechやshadowspeakのテクニックを活用して、英語力を高めましょう。
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。