쉐도잉 연습: How do stem cells work in the body? - 영상으로 영어 말하기 배우기
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1
Whenever there is an injury or a challenge to an organ or tissue, a whole process of renewal takes place in the body to help restore optimal health.
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Soon after the injury, the affected tissue releases specific compounds that travel through the blood to the bone marrow.
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When the compounds released by the injured tissue reach the bone marrow,
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these messengers tell the stem cells in the bone marrow to divide and create new stem cells, which are then released from the bone marrow into the bloodstream.
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Slowly, the number of stem cells increases in the blood circulation.
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At the same time, the affected the affected tissue releases another compound called stromal-derived factor 1, or SDF1, that attracts stem cells.
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As stem cells circulate in the fine blood vessels of the affected tissue and sense the presence of this compound,
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they stop in the blood flow and migrate into the tissue.
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Inside the tissue, stem cells slowly migrate to the very site of injury where SDF1 is being secreted.
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When they reach the site of the injury and come into contact with the damaged tissue,
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stem cells begin to multiply and then slowly transform into cells of that tissue.
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Through this process of amplification, one stem cell can become thousands of tissue cells.
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It is through this natural process of renewal that the body maintains optimal health every day of our lives.
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Stemregen is a natural product made of plant extracts
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that have been documented to support the release of stem cells from the bone marrow, thereby increasing the number of circulating stem cells.
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More stem cells in circulation means that more stem cells are available to participate in the process of tissue repair.
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Vocabulary and speaking notes for this lesson
This C1 speaking lesson is built on the video “How do stem cells work in the body?”. The speaker keeps coming back to these words: cell, stem, tissue, marrow, bone. This video has 16 sentences and 284 words to shadow. The speech runs for 2:02. The speaker talks at a steady 140 words per minute, a comfortable pace for shadowing. Only 73% of the words are among the 3,000 most common in English, so the vocabulary is demanding.
Key vocabulary in this video
The 15 most advanced words in the video, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| marrow noun | /ˈmæɹəʊ/ | The substance inside bones which produces blood cells. |
| circulate verb | /ˈsɝ.kjʊˌleɪt/ | To move in circles or through a circuit. |
| migrate verb | /maɪˈɡɹeɪt/ | To relocate periodically from one region to another, usually according to the seasons. |
| renewal noun | The act of renewing. | |
| optimal adjective | /ˈɑptɪməl/ | The best, most favourable or desirable, especially under some restriction. |
| circulation noun | /ˌsɝkjʊˈleɪʃən/ | The act of moving in a circle, or in a course which brings the moving body to the place where its motion began. |
| amplification noun | /ˌæmplɪfɪˈkeɪʃən/ | The act, or result of amplifying, enlarging, extending or adding. |
| bloodstream noun | /ˈblʌd.stɹɪim/ | The flow of blood through the circulatory system of an animal |
| injure verb | /ˈɪn.d͡ʒɚ/ | To wound or cause physical harm to a living creature. |
| multiply verb | /ˈmʌltɪplaɪ/ | To increase the amount, degree or number of (something). |
| stromal adjective | /ˈstɹəʊ̯.məl/ | Of or relating to a stroma. |
| derive verb | /dɪˈɹaɪv/ | To obtain or receive (something) from something else. |
| messenger noun | /ˈmɛs.ən.d͡ʒɚ/ | One who brings messages. |
| extract noun | /ˈɛkstɹækt/ | Something that is extracted or drawn out. |
| thereby adverb | /ðɛɹˈbaɪ/ | By it; by that; by that means, or as a consequence of that. |
이 영상의 문법
화자가 가장 많이 쓰는 문형을 영상 속 실제 표현과 함께 정리했습니다.
| 문형 | 영상 속 표현 |
|---|---|
| 수동태 be + 과거분사 — 누가 하는지보다 무슨 일이 일어나는지에 초점 | being secreted · have been documented |
| 현재완료 have/has + 과거분사 — 과거의 일이 지금도 관련이 있을 때 | have been documented |
| 관계절 who / which + 절 — 사람이나 사물에 대한 추가 정보 | cells, which are |
Pronunciation to watch
- The “sh” and “zh” sounds: circulation /ˌsɝkjʊˈleɪʃən/, amplification /ˌæmplɪfɪˈkeɪʃən/
- Long words — get the stress right: circulation /ˌsɝkjʊˈleɪʃən/, amplification /ˌæmplɪfɪˈkeɪʃən/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
- Record yourself and compare with the original, paying attention to words like marrow, circulate, migrate.
쉐도잉이란? 영어 실력을 빠르게 키우는 과학적 방법
쉐도잉(Shadowing)은 원래 전문 통역사 훈련을 위해 개발된 언어 학습 기법으로, 다언어 학자인 Dr. Alexander Arguelles에 의해 대중화된 방법입니다. 핵심 원리는 간단하지만 매우 강력합니다: 원어민의 영어를 들으면서 1~2초의 짧은 지연으로 즉시 소리 내어 따라 말하는 것——마치 '그림자(shadow)'처럼 화자를 따라가는 것입니다. 문법 공부나 수동적인 청취와 달리, 쉐도잉은 뇌와 입 근육이 동시에 실시간으로 영어를 처리하고 재현하도록 훈련합니다. 연구에 따르면 이 방법은 발음 정확도, 억양, 리듬, 연음, 청취력, 말하기 유창성을 크게 향상시킵니다. IELTS 스피킹 준비와 자연스러운 영어 소통을 원하는 분들에게 특히 효과적입니다.