シャドーイング練習: The secret language of trees - Camille Defrenne and Suzanne Simard - YouTubeで英語スピーキングを学ぶ
C2
Most of the forest lives in the shadow of the giants that make up the highest canopy.
36 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
Most of the forest lives in the shadow of the giants that make up the highest canopy.
2
These are the oldest trees, with hundreds of children and thousands of grandchildren.
3
They check in with their neighbors, sharing food, supplies, and wisdom gained over their long lives.
4
They do all this rooted in place, unable to speak, reach out, or move around.
5
The secret to their success lies under the forest floor, where vast root systems support the towering trunks above.
6
Partnering with these roots are symbiotic fungi called mycorrhizae.
7
These fungi have countless branching, thread-like hyphae that together make up the mycelium.
8
The mycelium spreads across a much larger area than the tree root system and connect the roots of different trees together.
9
These connections form mycorrhizal networks.
10
Through mycorrhizal networks, fungi can pass resources and signaling molecules between trees.
11
We know the oldest trees have the largest mycorrhizal networks with the most connections to other trees, but these connections are incredibly complicated to trace.
12
That’s because there are about a hundred species of mycorrhizal fungi– and an individual tree might be colonized by dozens of different fungal organisms, each of which connects to a unique set of other trees, which in turn each have their own unique set of fungal associations.
13
To get a sense of how substances flow through this network, let’s zoom in on sugars, as they travel from a mature tree to a neighboring seedling.
14
Sugar’s journey starts high above the ground, in the leaves of the tallest trees above the canopy.
15
The leaves use the ample sunlight up there to create sugars through photosynthesis.
16
This essential fuel then travels through the tree to the base of the trunk in the thick sap.
17
From there, sugar flows down to the roots.
18
Mycorrhizal fungi encounter the tips of the roots and either surround or penetrate the outer root cells, depending on the type of fungi.
19
Fungi cannot produce sugars, though they need them for fuel just like trees do.
20
They can, however, collect nutrients from the soil much more efficiently than tree roots— and pass these nutrients into the tree roots.
21
In general, substances flow from where they are more abundant to where they are less abundant, or from source to sink.
22
That means that the sugars flow from the tree roots into the fungal hyphae.
23
Once the sugars enter the fungus, they travel along the hyphae through pores between cells or through special hollow transporter hyphae.
24
The fungus absorbs some of the sugars, but some travels on and enters the roots of a neighboring tree, a seedling that grows in the shade and has less opportunity to photosynthesize sugars.
25
But why does fungus transport resources from tree to tree?
26
This is one of the mysteries of the mycorrhizal networks.
27
It makes sense for fungus to exchange soil nutrients and sugar with a tree— both parties benefit.
28
The fungus likely benefits in less obvious ways from being part of a network between trees, but the exact ways aren’t totally clear.
29
Maybe the fungus benefits from having connections with as many different trees as possible, and maximizes its connections by shuttling molecules between trees.
30
Or maybe plants reduce their contributions to fungi if the fungi don’t facilitate exchanges between trees.
31
Whatever the reasons, these fungi pass an incredible amount of information between trees.
32
Through the mycorrhizae, trees can tell when nutrients or signaling molecules are coming from a member of their own species or not.
33
They can even tell when information is coming from a close relative like a sibling or parent.
34
Trees can also share information about events like drought or insect attacks through their fungal networks, causing their neighbors to increase production of protective enzymes in anticipation of threats.
35
The forest’s health relies on these intricate communications and exchanges.
36
With everything so deeply interconnected, what impacts one species is bound to impact others.
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
このレッスンについて
このレッスンでは、樹木のコミュニケーションについて学びます。木々は見えないネットワークを介してお互いに情報を伝え合い、協力し合っています。このプロセスを理解することで、英語のリスニング力とスピーキング力を向上させることができます。特に、YouTubeで英語学習を行いながら、動画の内容を実際に復唱する「shadow speak」に挑戦しましょう。この方法は、英語の発音を良くするためにも非常に効果的です。
重要な語彙とフレーズ
- mycorrhizae - 菌根、樹木と共生する菌類のこと
- mycelium - 菌糸体、真菌の中央部分で、他の木々との接続を作る
- photosynthesis - 光合成、植物が光を使ってエネルギーを作る過程
- symbiotic - 共生的な、相互利益を持つ関係を指す
- nutrients - 栄養素、植物が成長するために必要な物質
- network - ネットワーク、相互に繋がるシステム
- drought - 干ばつ、水が不足する時期
- communicate - コミュニケートする、情報を伝えること
練習のヒント
このビデオは比較的スローなスピードで話されています。最初は、shadow speaksで声に出して繰り返すことから始めましょう。特に重要なフレーズや単語を選び、動画を見ながら同じリズムで発音することが大切です。例えば、「mycorrhizal networks」というフレーズはリズムを意識して練習すると、発音がスムーズになります。また、IELTS スピーキング対策として、話す際の自分の声を録音して、正しい発音とイントネーションを確認するのも効果的です。覚えた語彙を使って文章を作り、自分の言葉で説明してみることも実践に役立ちます。
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。