シャドーイング練習: Coffee and what it does to your body - BBC World Service - YouTubeで英語スピーキングを学ぶ
C1
シャドーイング コントロール
0% 完了 (0/52 文)
By the time you finish watching this video, 8 million cups of coffee will have been drunk all over the world.
⏸ 一時停止中
再生速度:
リピート回数:
待機モード:
字幕同期:0ms
すべての文52 文
1
By the time you finish watching this video, 8 million cups of coffee will have been drunk all over the world.
2
Coffee has been consumed for at least one and a half thousand years, and some say its impact is so great that it helped fuel the Enlightenment, which gave rise to some of the big ideas that underpin the world as we know it.
3
The main active ingredient of coffee is caffeine, which is considered the most widely consumed psychoactive drug on the planet.
4
So where does coffee come from and what does it do to us when we drink it?
5
Coffee comes from the fruit of the Koffeer Arabica plant that originated in Ethiopia.
6
One story claims a 9th century goat herder called Kaldi saw his goats were more full of energy after eating coffee berries, so he had a bite too.
7
Historic records suggest the Sufis of Yemen roasted the seed of the coffee berry to create the beverage we recognize today.
8
In the 15th century, the first coffee houses began to appear across the Ottoman Empire before spreading to Europe in the following centuries.
9
Coffee houses in Europe became a space for discussing business, politics and new ideas.
10
One academic, Jürgen Habermas, even says, without coffee, we might not have had the Enlightenment.
11
Philosophers like Kant and Voltaire, who is said to have drunk as many as 72 cups a day, started to question the Catholic Church's interpretation of the world.
12
Instead, they looked to science, believing that everything in the universe could be rationally explained.
13
This so-called age of enlightenment radically changed the world as we knew it.
14
It led to the overthrow of monarchs, the growth of democracy and numerous scientific discoveries.
15
Coffee also fuelled the slave trade.
16
The French used slaves from Africa on plantations in Haiti and by the early 1800s Brazil was producing a third of the world's coffee using African slaves.
17
Did coffee give rise to capitalism too?
18
Companies started giving away coffee to their workers and eventually let them have coffee breaks.
19
This wasn't an altruistic move.
20
They were trying to increase worker productivity.
21
Fast forward to the present and two billion cups of coffee are consumed every day.
22
It's a 90 billion dollars a year industry and more than that, it is a fundamental social part of everyday life for billions of people.
23
So how does coffee impact the body?
24
When caffeine enters your digestive system, it's absorbed by the intestine into the bloodstream.
25
But the effects only start when caffeine hits the nervous system.
26
This happens because caffeine has a chemical structure very similar to that of a substance produced by our own body, adenosine.
27
Caffeine binds to the body's adenosine receptors, which can be found on the surface of nerve cells.
28
It's like a key opening a lock.
29
Adenosine is known to slow down the sympathetic nervous system.
30
It reduces your heart rate and generates a state of drowsiness and relaxation.
31
By blocking these receptors, caffeine generates the opposite effect.
32
Your blood pressure, for example, may increase slightly, especially if you are not used to drinking coffee often.
33
The same goes for brain activity.
34
Caffeine stimulates the brain, suppresses hunger and helps you stay in a state of alertness so you can concentrate for longer.
35
Caffeine can have a positive impact on your mood, inhibit feelings of fatigue and can improve physical performance.
36
So many athletes use it as a supplement.
37
These effects can last between 15 minutes and two hours.
38
The body removes caffeine five to ten hours after consuming it, but caffeine's residual effects can last even longer.
39
If you want to optimize caffeine's effects on your body, experts suggest abstaining from caffeine in the afternoon so your cup of coffee the following morning has more impact.
40
Coffee also requires care when it's drunk.
41
For healthy adults, the recommended maximum limit is 400mg of caffeine a day.
42
That's about 4 or 5 cups of coffee.
43
Exceeding this limit can lead to side effects such as insomnia, nervousness, anxiety, tachycardia, stomach discomfort, nausea and headache.
44
Toxic effects like seizures can be seen after the rapid consumption of around 1,200 mg of caffeine.
45
That's the equivalent of around 12 cups of coffee.
46
Of course, these limits vary from person to person.
47
people are genetically more sensitive to caffeine.
48
But when drunk in moderation, coffee can be good for your health.
49
For instance, it's associated with a reduced risk for type 2 diabetes, cardiovascular disease, some cancers and Parkinson's.
50
And these health gains aren't just linked to caffeine.
51
Coffee has other beneficial substances, such as chlorogenic acid, a potent antioxidant that may reduce the risk of many diseases.
52
So, next time you grab a cup of coffee, you might not look at it the same again.
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
なぜこの動画で話す練習をするべきか？
「Coffee and what it does to your body」では、コーヒーの歴史や健康への影響について語られています。この動画を通じて、英語スピーキング練習を行うことで、コーヒーがどのように私たちの体に作用するのかを具体的に理解することができます。また、軽快なトーンで話されているため、会話に必要なリズムやイントネーションを学ぶことができ、IELTS スピーキング対策にも役立ちます。さらに、世界的な文化について話す際の重要な表現や語彙を身につけることができるため、YouTubeで英語学習の一環としても最適です。
文法と表現の文脈
この動画では、いくつかの重要な構文が使用されています。以下はその一部です。:
- 過去形の使用: 「was consumed」は、コーヒーの歴史を振り返る際に使用されています。過去の出来事を伝えるときに頻繁に使われる文法です。
- 受動態: 「coffee houses were established」など、受動態が用いられ、行為の主体を強調しています。これにより、社会的な影響について詳しく説明できます。
- 条件文: 「if you want to optimize caffeine's effects」などの表現は、条件付きの情報を提供する際に役立ちます。会話の中で条件を示すことで、より柔軟なコミュニケーションが可能になります。
一般的な発音の落とし穴
動画内では、いくつかのトリッキーな発音が登場します。例えば、「caffeine」や「adenosine」のような科学用語は、正しい発音を習得するために特に注意が必要です。また、英語のリズムに合わせて発音することで、流暢さを向上させることができます。このように、英語スピーキング練習を通じて、発音の精度を高めることができます。
この動画を使って、shadowspeaksメソッドでの話す練習や反復を行うことで、リスニング力とスピーキング力が向上し、英語でのコミュニケーションがより効果的になるでしょう。
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。