跟读练习: Dust Is Not What You Think - 通过视频学习英语口语
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15 句
如果句子过短或过长，请点击 Edit 进行调整。
1
What actually is dust?
2
Only about 1% of household dust comes from dead skin and hair.
3
It's mostly a mix of soil, pollen and other particles from outside, along with tiny textile fibers from inside your home.
4
But that's not all.
5
One gram can hold thousands of mites, microscopic spider relatives that feed on your skin, as well as hundreds of thousands of their fecal pellets.
6
When inhaled, their proteins can weaken your airways protective barrier, causing one of the most common allergic reactions on the planet.
7
The smallest particles are even worse.
8
Below 2.5 micrometers, particles like soot can get deep into your lungs and cross into your bloodstream, contributing to millions of deaths every year.
9
But dust also helps make rain.
10
Every raindrop forms around a tiny particle, giving water vapor something to condense on.
11
That's how 28 million tons of Saharan dust replaces the phosphorus tropical rains washed from the Amazon soil every year.
12
Without it, the rainforest would slowly starve.
13
And there's one final secret ingredient.
14
Every year, Earth gets showered with over 5,000 tons of comet and asteroid dust.
15
So the next time you dust, remember, for every pinch of regular household dust, there's a few nanograms of star dust.
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本课的词汇与口语要点
这节 C1 级别的口语课以视频“Dust Is Not What You Think”为素材。 这段视频共有 15 个句子、201 个单词可供跟读。 讲话部分时长为 1:11。 说话人语速自然，每分钟约 171 个词，接近日常对话。 只有 69% 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 15 个单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| particle 名词 | /ˈpɑɹtək(ə)l/ | 粒子 |
| airway 名词 | /ˈɛɚ.weɪ/ | 空中航線 /空中航线 |
| bloodstream 名词 | /ˈblʌd.stɹɪim/ | 血液, 血流 |
| inhale 动词 | /ɪnˈheɪl/ | 吸氣 /吸气, 吸入 |
| micrometer 名词 | /maɪˈkɹɑmɪtəɹ/ | 千分尺 |
| phosphorus 名词 | /ˈfɑs.fɚ.əs/ | 磷 |
| pollen 名词 | /ˈpɑlən/ | 花粉 |
| raindrop 名词 | /ˈɹeɪndɹɑp/ | 雨滴, 雨點 /雨点 |
| rainforest 名词 | /ˈɹeɪn.fɔɹ.ɪst/ | 雨林 |
| weaken 动词 | /ˈwikən/ | 削弱, 減弱 /减弱 |
| starve 动词 | /stɑɹv/ | 餓死 /饿死 |
| vapor 名词 | /ˈveɪpɚ/ | 蒸氣 /蒸气 |
| asteroid 名词 | /ˈæst(ə)ɹɔɪd/ | 小行星 |
| comet 名词 | /ˈkɒmɪt/ | 彗星, 掃帚星 /扫帚星 |
| ingredient 名词 | /ɪnˈɡɹiːdi.ənt/ | 成份, 材料 |
需要注意的发音
- 长单词——注意重音位置: micrometer /maɪˈkɹɑmɪtəɹ/, microscopic /ˌmaɪ.kɹəˈskɑ.pɪk/, ingredient /ɪnˈɡɹiːdi.ənt/
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。
- 先用 0.75 倍速逐句跟读，熟练之后再回到正常速度。
- 录下自己的声音并与原声对比，特别注意 particle, airway, bloodstream 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。