跟读练习: IELTS listening part 3 Product development presentation: mosquito net - 通过视频学习英语口语

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Part 3.
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You will hear a business studies student called Edward talking to his tutor about some research he is doing on product development.
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First, you have some time to look at questions 21 to 25.
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Now listen carefully and answer questions 21 to 25.
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Hello, Edward.
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Sit down.
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Thanks.
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I need some advice on my presentation about product development.
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Right.
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Have you decided what to focus on?
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Yes.
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The product I've chosen is a particular type of mosquito net.
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Any reason for choosing that?
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Hmm.
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I spent last summer travelling round Africa with a friend.
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He's studying medicine, so when we were in a region where mosquitoes cause malaria, we visited a medical centre.
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I chatted to an administrator while my friend talked to one of the doctors,
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and I found out they've had far fewer cases of malaria since these mosquito nets became available locally.
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That made me interested in them.
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Hmm, OK.
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Mosquito nets have quite a long history, don't they?
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I believe they'd been used in Japan for centuries.
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That's right.
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Though apparently Queen Cleopatra slept under one in ancient Egypt.
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That was probably where they were invented.
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And much later nets were used in China, so perhaps they were invented there independently.
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Originally they were made of silk, but later cotton was used, and nowadays they're mainly synthetic.
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It wasn't until the middle of the 20th century that they developed nets treated with insecticides for use by the military, and that was a major step forward.
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They used an insecticide called DDT, but it was later found that this could be harmful to people as well as mosquitoes.
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Is that still a problem with modern nets?
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Oh, no. The chemicals used nowadays are safe, even if people sleep under them every night.
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And the nets work, and they're odour-free.
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But they have to be treated fairly often with the chemical, which the owners need to do themselves.
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Hmm.
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Presumably distribution of the chemical can be a problem in remote areas?
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I mean, people may not be able to get hold of it easily.
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That's right.
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Hmm.
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OK, tell me about this net you're going to talk about.
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Well, the brand name is Olliset, and the product was invented by a Japanese company.
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These nets are an improvement on the alternatives because the insecticide is contained inside the fibre and released gradually.
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It's not coated on the outside as with ordinary nets.
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So the chemicals don't have to be replaced?
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Right.
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And Oli-set nets are also tougher and don't tear as easily.
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They give protection for at least five years compared with a year or two for other nets.
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Well, it sounds interesting.
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But for your seminar presentation, will you provide the bigger picture as well?
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Yes.
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It'll be a case study of product development.
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Before you hear the rest of the discussion, you have some time to look at questions 26 to 30.
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Now listen and answer questions 26 to 30.
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I thought I'd introduce my presentation by describing the background to the new product, the general context.
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You mean the business context?
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Where the investment's coming from and that sort of thing?
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Well, I was thinking I'd talk first about insect-borne diseases, particularly malaria
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and why there's such an urgent need for new ways of fighting it.
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Some people might not know much about it.
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Yes, that's a good idea.
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I've got some statistics about the numbers of people worldwide who get the disease each year.
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I thought I'd show those.
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They're quite staggering.
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I can imagine.
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It's one of the world's biggest health problems, after all.
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It'd also be useful if you could find some statistical information on how malaria affects countries' economic output and present that too.
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OK, I'm sure I can find something.
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After that, I'll talk about mosquito nets.
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First, the historical development, just briefly, and then I'll introduce the Ollyset mosquito net.
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Yes, keep it simple.
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You could just present a bulleted list of its characteristics, the things that make it different from other types of net, and talk that through.
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Right.
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Then I thought I'd outline the production process.
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Fine.
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Should I give some information about where the money for the project has come from?
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There are lots of government and private sponsors.
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Definitely.
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That's a very important aspect of any product development.
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Where are the nets being manufactured, by the way?
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Oh, over half are made in Tanzania by a company called A-Z.
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They got an interest-free loan to buy in the necessary machinery.
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Well, I'd say a bit about the company profile as well, and then present figures about numbers of staff and the kinds of people they're employing on the Ollyset project,
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if you can find the details.
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Hmm, OK.
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I haven't included any information about marketing.
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I've got a lot of notes about it, but I'm not sure how to present them.
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I wouldn't mention that if I were you.
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You've only got a short time for your presentation and you've got quite a lot of material here already.
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But you should provide some figures about output.
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Have you found out from the company's website how many nets they actually produce?
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Yes, it's over 30 million a year.
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Right.
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Then I'm not sure how to finish off.
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What do you think about including something on potential...
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That is the end of part three.
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You now have 30 seconds to check your answers to part three.
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Thank you.

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对话背景与情境

这段视频展示了雅思听力第三部分的典型场景：商科学生爱德华与导师讨论他关于“蚊帐产品开发”的研究报告。对话围绕蚊帐的历史、改进及实际应用展开，涵盖了产品研发、跨文化背景等内容，不仅能帮助学习者熟悉雅思听力的学术讨论场景，也是看YouTube学英语的优质素材，适合用于雅思口语练习和日常表达积累。

日常交流高频短语5则

  • get hold of：意为“获得，找到”。如对话中“人们可能难以轻易获得杀虫剂”，可用于表达获取某物的困难。
  • a major step forward：“重大进展”。描述产品升级或技术突破时可用，如“蚊帐添加杀虫剂是一大进步”。
  • compared with：“与……相比”。用于对比事物差异，是口语中常用的逻辑连接短语。
  • the bigger picture：“更宏观的视角”。导师提醒爱德华在报告中涵盖整体背景，可引申为“全局观”。
  • case study：“案例研究”。学术讨论中常用，指对具体实例的分析，适用于英语口语练习中的话题展开。

分步影子跟读指南

针对视频中学术对话的特点，采用shadowspeak技巧可有效提升听力和口语能力：
1. 先完整听一遍对话，关注整体逻辑（如爱德华选择蚊帐的原因、产品改进点），建立内容框架。
2. 逐句跟读，重点模仿连读（如“travelling round”）和语调（导师提问时的升调），提高英语发音的自然度。
3. 暂停视频，用自己的话复述关键信息（如“Olliset蚊帐的优势”），强化语言输出能力。
4. 针对复杂句式（如“直到20世纪中叶才研发出杀虫剂处理的蚊帐”），拆分结构并反复练习，提升口语表达的流畅性。

视频中的语法

说话人最常用的结构，并附上视频中的原话：

结构视频中的用法
被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的were invented · were made · be treated
现在完成时 have/has + 过去分词 — 过去发生但与现在仍有关联的事Have you decided · I've chosen · they've had

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。

影子跟读法: 阅读完整分步指南 →