跟读练习: Can you solve the world’s most evil wizard riddle? - Dan Finkel - 通过YouTube学习英语口语
C1
The Evil Wizard Moldavort has been trying to kill you for years,
⏸ 已暂停
速度:
所有句子77 句
如果句子过短或过长，请点击 Edit 进行调整。
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.
下载应用
AI 为你说出的每个句子打分
TRENDING
热门
App Store 和 Google Play 评分 4.9/5
Shadowing English
移动端
随时随地使用 Shadowing English 应用学习英语。今天就提高您的沟通技巧！
跟踪您的学习进度
AI 评分和纠错
丰富的视频库
关于本节课
在本节课中，您将通过探索一则关于"邪恶巫师"摩尔德沃特的谜题，来提高您的英语口语能力。您将学习如何选择适当的数字以限制摩尔德沃特的移动，从而掌握逻辑推理的英语表达方式。这一练习不仅有助于提高您的英语听力和口语能力，还能让您在解决问题的同时，深化对数学概念（如毕达哥拉斯定理）的理解。通过这种有趣的方式，您将能够在实际的沟通场合运用这些高级英语词汇和短语。
关键词汇与短语
- 邪恶巫师 - evil wizard
- 保护咒语 - protective charms
- 被诅咒的棋盘 - cursed chessboard
- 积极的整数 - positive whole numbers
- 移动 - move
- 对角线 - diagonal
- 毕达哥拉斯定理 - Pythagorean Theorem
- 策略 - strategy
练习技巧
为了最大程度地提高您的英语口语练习效果，建议通过shadowing site来跟读视频中的内容。在学习的过程中，可以选择暂停视频，尝试模仿讲者的语速与语调。尽量在语音和语调上做到准确，这样能帮助您更好地掌握英语口语练习的技巧。
视频中的内容较快，因此在看YouTube学英语时，可以多做几次回放，确保您跟得上讲者的表达方式。同时，把您练习的录音上传到shadowspeaks或shadowspeak等平台上，与他人分享您的进展和学习经验，这样可以获得反馈，进一步提升您的口语能力。
在阅读并理解谜题的过程中，尝试用英语描述您的解题思路，这将有助于增强您的逻辑思维能力和英语表达能力。通过这样的互动式学习，您将能更为自信地在实际场景中运用英语。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。