跟读练习: What is radioactive waste? - 通过视频学习英语口语
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What is radioactive waste?
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Radioactive waste is any liquid, gas, or solid that contains a radioactive nuclear substance and for which there is no foreseeable use.
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There are four general classes of radioactive waste in Canada.
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Uranium mine and mill waste, low -level radioactive waste, intermediate -level radioactive waste, and high -level radioactive waste.
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The first of the four general classes is uranium mine and mill waste.
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This includes tailings and waste rock generated by the mining and milling of uranium ore.
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Tailings have the consistency of fine sand, while waste rock is simply gravel and broken up rock.
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Next, we have low -level radioactive waste, which is more radioactive than clearance levels and exemption quantities allow.
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It requires isolation and containment for up to several hundred years.
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Nuclear power plants, research reactors, test facilities, radioisotope manufacturers or users,
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uranium refining and conversion, and nuclear fuel fabrication facilities produce low -level waste.
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It can come in various forms such as used equipment, paper, cable, clothing, decommissioned parts and even mops.
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Thirdly, we have intermediate level radioactive waste which contains concentrations of long -lived radionuclides, elements that emit radiation.
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It requires isolation and containment for longer than several hundred years.
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Nuclear power plants, prototype and research reactors, test facilities and radioisotope manufacturers and users produce intermediate level waste.
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It can come in the form of refurbishment waste, such as old components, ion exchange resins,
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and some radioactive sources used in radiation therapy.
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Lastly, we have high -level radioactive waste, which is primarily used nuclear fuel,
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along with small amounts of waste that generate significant heat and radioactivity.
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It requires long -term isolation.
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Nuclear power plants, prototype and research reactors, and test facilities produce high -level waste.
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It comes in the form of used nuclear fuel that is still significantly radioactive.
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The Canadian Nuclear Safety Commission regulates all classes
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and forms of radioactive waste in Canada to protect the health and safety of people and the environment.
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You can find more More info at nuclearsafety .gc .ca.
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本课的词汇与口语要点
这段视频共有 25 个句子、335 个单词可供跟读。 讲话部分时长为 2:42。 说话人语速平稳，每分钟约 124 个词，很适合跟读。 只有 77% 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 15 个值得学习的单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| radioactive 形容词 | /ˌɹeɪdioʊˈæktɪv/ | 放射性 |
| uranium 名词 | /ˌjuː.ˈɹeɪ.ni.əm/ | 鈾 /铀 |
| mill 名词 | /mɪl/ | 磨坊, 磨機 /磨机 |
| intermediate 形容词 | /ɪn.tə(ɹ)ˈmi.di.ət/ | 中間 /中间, 中級 /中级 |
| isolation 名词 | /ˌaɪsəˈleɪʃən/ | 隔離 /隔离, 隔斷 /隔断 |
| reactor 名词 | /ɹiˈæktɚ/ | 反應器 /反应器 |
| radiation 名词 | /ˌɹeɪ.diˈeɪ.ʃən/ | 放射, 輻射 /辐射 |
| manufacturer 名词 | /ˌmænjʊˈfæktʃəɹə/ | 製作者 /制作者, 製造者 /制造者 |
| prototype 名词 | /ˈpɹəʊtətaɪp/ | 原型, 雏形 |
| clothing 名词 | /ˈkloʊðɪŋ/ | 衣服, 衣裳 |
| element 名词 | /ˈɛləmənt/ | 要素 |
| sand 名词 | /sænd/ | 沙, 沙子 |
| liquid 名词 | /ˈlɪk.wɪd/ | 液體 /液体, 液態 /液态 |
| component 名词 | /kəmˈpoʊ.nənt/ | 元件, 部件 |
| concentration 名词 | /ˌkɑn.sənˈtɹeɪ.ʃən/ | 專注力 /专注力 |
需要注意的发音
- “th” 音: clothing /ˈkloʊðɪŋ/, thirdly /ˈθɚdli/
- “sh” 和 “zh” 音: isolation /ˌaɪsəˈleɪʃən/, radiation /ˌɹeɪ.diˈeɪ.ʃən/, concentration /ˌkɑn.sənˈtɹeɪ.ʃən/, conversion /kənˈvɝʒən/, exemption /ɪɡˈzɛm(p).ʃən/
- 长单词——注意重音位置: radioactive /ˌɹeɪdioʊˈæktɪv/, uranium /ˌjuː.ˈɹeɪ.ni.əm/, intermediate /ɪn.tə(ɹ)ˈmi.di.ət/, isolation /ˌaɪsəˈleɪʃən/, radiation /ˌɹeɪ.diˈeɪ.ʃən/
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 radioactive, uranium, mill 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。