쉐도잉 연습: A1C Test for Measuring Blood Sugar Levels - 영상으로 영어 말하기 배우기
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An A1c test is a blood test that can be used to estimate the average amount of glucose, or sugar, in your blood over the past three months.
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Other names for this test are HbA1c, glycated hemoglobin, and glycosylated hemoglobin.
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This test is often used to screen for or manage diabetes and prediabetes, conditions that can happen when your blood sugar is too high.
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In order to understand how the test works, it's important to know about red blood cells and how your blood sugar affects them.
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Most of the cells in your blood are called red blood cells.
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They are made in your bone marrow, which is the tissue in the center of your bones.
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From there, they travel to your lungs, where they pick up oxygen from the air you breathe in.
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This happens in tiny air sacs in your lungs, called alveoli.
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Here, oxygen attaches to proteins inside your red blood cells, called hemoglobin.
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Your red blood cells then deliver the oxygen to tissues throughout your body.
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After about three months, red blood cells wear out.
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As the worn-out cells pass through your liver and spleen, other types of blood cells,
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called macrophages, destroy them and remove them from your blood.
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Glucose in your blood can affect your red blood cells.
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After you eat, your body breaks down food into glucose and releases it into your blood.
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Your tissue cells take the glucose out of your blood and use it as their main source of energy.
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It's normal for some of the glucose in your blood to stick to the hemoglobin in your red blood cells.
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This process is called glycosylation.
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If your tissue cells aren't able to use the glucose, it can build up in the blood.
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This is called hyperglycemia.
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If you have high blood glucose, more of the hemoglobin in your red blood cells will have glucose stuck to it.
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An A1c test shows the percentage of red blood cells that have glucose attached to them.
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If your A1c numbers are higher, it means that your red blood cells were exposed to higher levels of blood glucose in the previous three months.
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The test shows results from this time period because glucose can only stick to hemoglobin while your red blood cells are alive,
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and they live for about three months.
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Higher than normal average blood glucose can mean you have diabetes.
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Your health care practitioner may recommend you get an A1c test if you are over 45 years old,
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are under 45 and have one or more risk factors for diabetes, or you had diabetes during pregnancy called gestational diabetes.
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During an A1c test, a healthcare professional, called a phlebotomist, will take a sample of blood from a vein in your arm
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or from one of your fingers using a small needle.
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At the lab, your blood sample will be tested to measure the amount of red blood cells
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that have glucose sticking to the hemoglobin in them.
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Your A1c numbers, which show the percentage of glucose-attached red blood cells, can be used to estimate your average blood glucose during the past three months.
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Your A1c test result may include a chart that shows estimated average blood glucose range based on A1c numbers.
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A normal A1c result means your blood sugar level is in the non-diabetic range.
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Or an A1c result may be considered normal for you, even if your blood sugar is slightly outside the non-diabetic range.
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This may happen because of your age or medical conditions you have, such as diabetes.
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An abnormally high A1c test result means your blood sugar has been too high over the past three months.
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You may be diagnosed with prediabetes or diabetes if you haven't already been told you have it.
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Or, if you're living with diabetes, an abnormal result means your blood sugar is not well controlled.
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If your A1C result stays high, your healthcare practitioner will talk to you about how to manage your blood sugar.
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People with diabetes will need to have an A1C test at least twice a year.
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People with prediabetes will need to be tested every year or two, or as often as your healthcare practitioner recommends.
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If your A1C is normal but you had gestational diabetes, or you have risk factors for diabetes, then you will need the test every three years.
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To find out more about the A1C test, talk to your health care practitioner.
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Thank you.
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이 레슨의 어휘와 말하기 포인트
이 C1 수준 말하기 레슨은 영상 “A1C Test for Measuring Blood Sugar Levels”을(를) 바탕으로 합니다. 가장 자주 반복되는 단어는 다음과 같습니다: blood, cells, glucose, test, diabetes. 이 영상에는 섀도잉할 문장 46개와 단어 758개가 있습니다. 말하는 구간의 길이는 5:12입니다. 화자는 분당 약 146단어의 일정한 속도로 말해서 섀도잉하기에 편한 속도입니다. 단어의 82%가 영어에서 가장 많이 쓰이는 3,000단어에 속합니다. 나머지는 연습 전에 미리 확인해 두세요.
이 영상의 핵심 어휘
영상에서 가장 어려운 단어 11개를 발음, 뜻과 함께 정리했습니다.
| 단어 | 발음 | 뜻 |
|---|---|---|
| glucose 명사 | /ˈɡluː.kəʊz/ | 포도당, 글루코스 |
| hemoglobin 명사 | /ˌhimoʊˈɡloʊbɪn/ | 헤모글로빈, 혈색소 |
| practitioner 명사 | /pɹækˈtɪʃənəɹ/ | 전문직 종사자 |
| attach 동사 | /əˈtæt͡ʃ/ | 첨부하다, 붙이다 |
| alveolus 명사 | /ælˈvi.əl.əs/ | 폐포 |
| diagnose 동사 | /ˈdaɪ.əɡˌnoʊs/ | 진단 |
| hyperglycemia 명사 | 고혈당증 | |
| spleen 명사 | /spliːn/ | 지라 |
| marrow 명사 | /ˈmæɹəʊ/ | 골수 |
| vein 명사 | /veɪn/ | 정맥 |
| needle 명사 | /ˈniː.dəl/ | 바늘 |
영상에 나오는 구동사
| 단어 | 뜻 |
|---|---|
| pick up 동사 | 줍다 |
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 | are called · are made · is called |
| 현재완료 have/has + 과거분사 — 과거의 일이 지금도 관련이 있을 때 | has been · haven't already been told |
주의할 발음
화자는 aren't, haven't, you're 같은 축약형과 약화된 형태를 3번 사용합니다. 들리는 대로 짧게 발음하세요.
- “sh”와 “zh” 소리: practitioner /pɹækˈtɪʃənəɹ/, glycosylation /ˌɡlaɪ.koʊ.səˈleɪ.ʃən/
- 긴 단어 — 강세 위치에 주의: hemoglobin /ˌhimoʊˈɡloʊbɪn/, practitioner /pɹækˈtɪʃənəɹ/, abnormally /æbˈnɔɹ.mə.li/, alveolus /ælˈvi.əl.əs/, glycosylation /ˌɡlaɪ.koʊ.səˈleɪ.ʃən/
한국어 화자가 어려워하는 소리:
- /v/ — ㅂ(/b/)과 구별하기: alveolus /ælˈvi.əl.əs/, vein /veɪn/
- /z/ — ㅈ이 아니라 성대를 울리는 /s/: glucose /ˈɡluː.kəʊz/, expose /ɪkˈspoʊz/
- /r/과 /l/ 구별하기: abnormally /æbˈnɔɹ.mə.li/, abnormal /ˌæbˈnɔɹ.ml̩/
이 영상으로 연습하는 방법
- 먼저 말하지 않고 영상을 끝까지 듣고 모르는 단어를 적어 둡니다.
- 보통 속도로 한 문장씩 섀도잉하고, 화자의 리듬과 맞을 때까지 반복합니다.
- 자신의 목소리를 녹음해 원본과 비교하고, glucose, hemoglobin, practitioner 같은 단어에 특히 주의합니다.
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.