跟读练习: Lab-grown meat is on the rise — here's how it is made - 通过视频学习英语口语

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From the poor treatment of animals to uneven food distribution and even climate change,

lab-grown food is being hailed by some as a solution for many of today's biggest issues.

Our global agricultural system is responsible for over a quarter of all greenhouse gas emissions.

Among the worst offenders are beef, dark chocolate, coffee and fish based on emissions per kilogram.

There has been a lot of hype around cell-cultivated food, but how viable is the industry?

What does it entail and more importantly, will consumers bite?

Can you do the honours and lift the lid on your creation?

Over a decade ago on the Edge, we reported on the world's first ever cultured beef burger.

Unveiled by Professor Mark Post from Maastricht University, it cost around €250,000 to produce.

He went on to set up MoSoMeat, a company which aims to bring the burger to the masses, and he's not alone.

There are now hundreds of startups developing their own lab-grown products, but just how do they do it?

It's a relatively simple procedure and similar for both meat and plant-based production.

For meat, simply take stem cells from animal's tissue, add a nutrient-rich solution and watch the cells multiply into the three main components of meat,

muscle, fat and connective tissue.

Then put the cells into bioreactors or as they're more commonly known, cultivators.

The cells are then separated and rearranged to build a final edible product.

This part of the process is called scaffolding and can be very complicated.

A steak for instance needs a lot more scaffolding than ground meat in a burger.

The entire process takes between two and eight weeks but the payoff can be huge.

It's estimated that just one thousandth of a pound of cow cells can create up to 4.4 billion pounds of beef.

That sounds like an impressive return.

So what's the hold up?

Well, cost is a big issue.

Currently, lab-grown meat is around 40% more expensive than animal meat.

And then there's health and safety concerns.

All production must happen in a completely sterile environment because the cells have no natural immunity from diseases.

And while traditional meat is nutritionally dense, most of its proteins, vitamins and minerals are introduced via animal feed.

You have to add these nutrients into cultured meat

and it's still unclear whether today's additives provide equal nutritional value in the long term.

As a result, regulators can't seem to align on the technology.

Singapore became the first country in the world to approve cultured meat for human consumption in 2020.

The US followed suit three years later, and the UK's Food Standards Agency approved use for pet food in early 2024.

Italy, meanwhile, has banned the production, sale and import of lab-grown meat entirely,

with the government citing its potential negative impact on the country's farming industry.

France and Romania might do the same.

The EU so far has not offered any guidance, but if it does green light use, it could put Brussels on a collision course with angry farmers.

Some critics are calling for more research into the environmental impacts of cultured food, especially if production is ramped up significantly.

After all, the manufacturing process still requires an energy source, but those championing the industry believe the benefits outweigh the negatives.

They say cultured food has the potential to dramatically reduce food waste, tantalise our taste buds with things we've never traditionally eaten,

and could provide health benefits by tailoring food to nutritional needs such as removing gluten

or saturated fats without compromising on the taste.

According to consulting firm McKinsey, cultivated meat could make up as much as half a percent of the world's meat supply by 2030,

making it a $25 billion global industry.

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本节课你将练习什么？

这节课我们通过一段关于“实验室培育肉”的YouTube视频，练习英语口语和听力。你会学到前沿科技相关的表达，还能通过跟读提升发音和流畅度。视频内容涉及环保、科技和食品行业，话题新颖，适合想要用英语讨论热点问题的学习者。

核心词汇与短语

lab-grown meat：实验室培育肉
greenhouse gas emissions：温室气体排放
bioreactors：生物反应器
nutrient-rich solution：富含营养的溶液
food distribution：食品分配
sterile environment：无菌环境

跟读练习技巧

视频语速中等，部分科技词汇发音需要注意。建议使用跟读网站（shadowing site）进行练习：先完整听一遍视频，熟悉内容；再逐句暂停，模仿发音和语调，尤其是“cultivated beef burger”“scaffolding”等长单词的重音。跟读时注意句子的停顿，比如“Our global agriculture system is responsible for over a quarter of all greenhouse gas emissions”，在“system”和“responsible”后稍作停顿，让表达更自然。

影子跟读法（shadow speech）是提高英语发音的好方法。可以尝试边看视频边跟读，跟不上时就暂停，重复练习难点句子。坚持每天练习10分钟，不仅能提升口语流畅度，还能积累话题词汇。看YouTube学英语就是要结合实际内容，边学边用，这样才能真正提高英语口语水平。

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	being hailed · are then separated · is called
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	has been · has banned · has not offered

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 →

跟读练习: Lab-grown meat is on the rise — here's how it is made - 通过视频学习英语口语

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本节课你将练习什么？

核心词汇与短语

跟读练习技巧

视频中的语法

什么是跟读法？