跟读练习: National Geographic Reading Explorer 2 Unit 6 Ocean Megabuilders - 通过视频学习英语口语
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24 句
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The bright colors of coral reefs can be seen in warm seas all around the planet.
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But they are not just beautiful, they are also hugely important to our oceans.
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1. Corals are actually animals.
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Though they may look like colorful plants, coral are in fact made up of tiny animals called polyps.
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Polyps can range from the size of a pinhead to a bit larger than a basketball.
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2. Corals are mega builders.
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Each polyp builds itself a skeleton out of limestone.
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These skeletons join together to form large colonies of hard corals.
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As polyp colonies grow over hundreds and thousands of years.
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They join with other colonies and become reefs that can stretch over hundreds of kilometers.
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The largest coral reef is Australia's Great Barrier Reef.
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It began growing about 20,000 years ago.
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Three, coral reefs are some of the most diverse ecosystems on Earth.
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Though they cover less than 1% of the ocean floor, coral reefs are home to 25% of all sea creatures.
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Up to 2 million species live in coral reefs around the world.
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4. Coral provide a window to the past.
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As coral grow over thousands or millions of years, their limestone skeletons form layers.
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These are similar to tree rings.
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They vary in thickness based on ocean conditions at the time.
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Scientists can study these layers to learn what the Earth's climate may have been like in the distant past.
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But what about the future?
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Unfortunately, climate change is dangerous for Earth's coral reefs, the animals that live there,
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and the 500 million people around the world who depend on reef fish for food.
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Unless we can slow down climate change, scientists warn that our oceans could lose many of their colorful reefs by the end of the 21st century.
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本课的词汇与口语要点
这节 B2 级别的口语课以视频“National Geographic Reading Explorer 2 Unit 6 Ocean Megabuilders”为素材。 视频中反复出现的词有：coral, reef, polyp, ocean, skeleton。 这段视频共有 24 个句子、289 个单词可供跟读。 讲话部分时长为 2:29。 说话人语速平稳，每分钟约 116 个词，很适合跟读。 只有 78% 的单词属于英语最常用的 3,000 词，词汇难度较高。
视频中的重点词汇
视频中最难的 12 个单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| coral 名词 | /ˈkɔɹəl/ | 珊瑚 |
| reef 名词 | /ɹiːf/ | 礁, 暗礁 |
| polyp 名词 | /ˈpɑlɪp/ | 息肉 |
| skeleton 名词 | /ˈskɛlətən/ | 骨骼, 骸骨 |
| limestone 名词 | /ˈlaɪmˌstoʊn/ | 石灰岩, 灰岩 |
| colorful 形容词 | /ˈkʌl.əɹ.fl̩/ | 豔 /艳 |
| hugely 副词 | /ˈhjuːd͡ʒli/ | 大大 |
| thickness 名词 | /ˈθɪknəs/ | 厚度 |
| ecosystem 名词 | /ˈikoʊˌsɪstəm/ | 生態系 /生态系, 生態系統 /生态系统 |
| builder 名词 | /ˈbɪl.dəɹ/ | 建築工人 /建筑工人, 建築工 /建筑工 |
| warn 动词 | /woɹn/ | 警告, 提醒 |
| depend 动词 | /dɪˈpɛnd/ | 信任, 信賴 /信赖 |
视频中出现的短语动词
| 单词 | 释义 |
|---|---|
| slow down 动词 | 減速 /减速, 放慢 |
需要注意的发音
中文母语者容易读错的音：
- 词尾辅音 — 要读清楚，后面不要加元音: reef /ɹiːf/, polyp /ˈpɑlɪp/, pinhead /ˈpɪn.hɛd/, thickness /ˈθɪknəs/, distant /ˈdɪstənt/
- /r/ 和 /l/ 的区别: coral /ˈkɔɹəl/, colorful /ˈkʌl.əɹ.fl̩/, builder /ˈbɪl.dəɹ/
如何用这段视频练习
- 先完整听一遍视频，不要开口，记下不认识的单词。
- 用正常速度逐句跟读，每句重复到你的节奏与说话人一致为止。
- 录下自己的声音并与原声对比，特别注意 coral, reef, polyp 这类单词。
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。