Shadowing Practice: How many robots does it take to run a grocery store? - Learn English Speaking with Video
Creating lesson...
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This is a grocery packing warehouse in the south -east of London.
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Folks have ordered their groceries online, and instead of people walking up and down the aisles of a traditional grocery store to pick up items,
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these little devices move more than a million items every day between them.
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Instead of trying to build machines that fit into a world designed for humans, this entire facility, the size of seven football fields, is custom -built to make this as efficient as possible.
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I cannot get across on camera just how incredibly large this whole place is.
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The top speed of those boxes is about 14km an hour, and they pass within 5mm of each other when they move.
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So, how many robots are there in the hive?
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Well, that depends on how you count them.
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What you're looking at behind me is the hive.
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We've got the grid, which is the metal structure.
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It's filled with products, so that product is housed within what we call totes, or these open boxes that you can see at the top of the grid.
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We have around 2 ,300 bots and they move the stock around the warehouse
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so that we can pair it up with customer orders to be delivered.
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The bots will move in the X and Y direction.
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They can also move in the Z direction.
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So we have a cable poise system that means
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that they can lower down a gripper assembly and grab onto the stock that we have in the grid.
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In some areas we have as deep as 21 totes all in a line.
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We have sensors underneath the bot that mean
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that every time it passes over one of the squares on the grid it has a laser underneath it
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that can tell when it moves over that cell.
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So it will say I've passed a cell, I've passed a cell, I've passed a cell.
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We have around 58 ,000 different types of individual products within the grid.
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We'll use the huge amounts of data
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that we gather to understand what customers are most likely to order
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and place them in the easiest to reach locations for bots.
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All of that combined means that we can have stock into the warehouse
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and out again from our suppliers into a delivery van in just five hours.
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The robots deliver their crates over to the packing area.
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Some of that packing is done by humans, but there are mechanical arms as well.
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One of the big problems they've got to solve is
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that grocery packaging is designed for people and the interactions between all the objects they deal with can be complicated.
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Currently we're standing underneath the grid structure that we saw earlier.
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The robots that we saw are actually dropping off products to the station.
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Once they're dropped off they become in control of the robot
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and the robot decides how to pick them before the grid robot picks up the tote and takes it away again.
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There's two 3D cameras above the totes so it takes an image of the storage box before it picks from it.
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It decides on the best grasp point, confirm that the product is correct and then place it into the customer shopping
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and it's doing all of that on live customer orders.
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We make sure that we don't mix something that was heavy with something that's soft.
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There are things that the robot can't pack, things such as very, very heavy, very large, or very fragile items, but there's a lot of range in between that.
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It's fairly safe to call each individual packing arm a robot.
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Each one has a separate controller and it has to make a lot of decisions in real time, using cameras and sensors on each individual arm.
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But here in the Hive, it's not quite as simple.
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Controlling all of this is what we refer to as the Hive Mind, so this artificial intelligence system that controls everything.
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Once the stop comes in, from that exact point that it enters the system, the hive mind will track its every single movement.
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The hive mind will tell the bots exactly where they need to stop, but it is the bots control system
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that allows it to follow a movement profile and stop exactly as the hive mind expects it to.
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There's just a 5mm gap between bots, so that's both as they pass each other and if they stop next to a bot as well.
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This bot with the orange light may have experienced something within its sensors
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and all of those readings it's taking that when it feeds
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that back to the hive mind it's not quite what the hive mind was expecting
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so it just brings it to a safe stop for investigation.
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We do have a number of grid operators
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that sit at the edge of the grid
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and they're able to use our CCTV system
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that we have above the grid to look at exactly what's going on with
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that bot and they can try and fix that remotely and send commands to the bot wirelessly.
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The boundary between individual and group is a little blurry.
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Is a termite colony a collection of individuals working together, or one big super -organism?
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Is the microbiome in your gut part of you?
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Because in the last couple of decades, scientists have started to work out that the bacteria in your digestive system produce and consume neurotransmitters that affect how you think.
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But most people wouldn't consider their gut bacteria to be part of them.
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We tend to ascribe intelligence and identity to things that act at roughly our scale.
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It's easy to look at the hive, see the moving boxes, and go, OK, 2 ,000 robots.
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But with only one controller, and the boxes just following the paths they're given, I'd say there's a good argument that that is one robot with 2 ,000 ways to interact with the world.
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Thank you so much to everyone here at Ocado.
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There is a link to them and more about their technology in the description.
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Thank you.
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Vocabulary and speaking notes for this lesson
This B2 speaking lesson is built on the video “How many robots does it take to run a grocery store?”. The speaker keeps coming back to these words: bot, hive, grid, robot, product. This video has 69 sentences and 1015 words to shadow. The speech runs for 5:07. The speaker talks fast, about 198 words per minute, so expect linked and reduced sounds. 83% of the words are among the 3,000 most common in English; the rest is worth studying before you start.
Key vocabulary in this video
The 15 most advanced words in the video, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| hive noun | /haɪv/ | A structure, whether artificial or natural, for housing a swarm of honeybees. |
| grid noun | /ɡɹɪd/ | A rectangular array of squares or rectangles of equal size, such as in a crossword puzzle. |
| bot noun | /bɑt/ | A physical robot. |
| tote noun | /toʊt/ | A tote bag. |
| sensor noun | /ˈsɛn.sɚ/ | A device or organ that detects certain external stimuli and responds in a distinctive manner. |
| grocery noun | /ˈɡɹəʊ.s(ə.)ɹi/ | Retail foodstuffs and other household supplies. |
| warehouse noun | /ˈwɛə(ɹ)haʊs/ | A facility for storing large amounts of merchandise or products. |
| underneath adverb | /ˌʌndɚˈniθ/ | Below; in a place beneath. |
| bacterium noun | /bækˈtɪəɹ.ɪəm/ | A single-celled organism with cell walls but no nucleus or organelles. |
| controller noun | /kənˈtɹoʊlɚ/ | One who controls something. |
| ascribe verb | /əˈskɹaɪb/ | To regard as arising from a specified cause or source. |
| blurry adjective | /ˈblɜːɹi/ | Not clear, crisp, or focused; having fuzzy edges. |
| digestive adjective | /daɪˈdʒɛstɪv/ | Of, relating to, or functioning in digestion. |
| gripper noun | /ˈɡɹɪ.pəɹ/ | A person who or thing which grips something. |
| microbiome noun | The genetic information (genomes) of a microbiota. |
Phrasal verbs you will hear
| Word | Pronunciation | Meaning |
|---|---|---|
| drop off verb | To fall asleep. | |
| pick up verb | To lift; to grasp and raise. | |
| get across verb | To cross; to move from one side (of something) to the other, literally or figuratively. | |
| move over verb | To move (oneself, or someone/something else) so as to free up space. | |
| pass over verb | To bypass or disregard in favour of someone or something else. | |
| work out verb | /ˌwɝk ˈaʊt/ | To calculate. |
| work together verb | To be coworkers with someone; to share a workspace with someone. |
Sentences worth repeating
Short, complete lines from the video that you can reuse in everyday conversation:
- What you're looking at behind me is the hive.
- We've got the grid, which is the metal structure.
- Is the microbiome in your gut part of you?
Grammar in this video
The structures the speaker uses most, with the exact words from the video:
| Structure | In the video |
|---|---|
| Passive voice be + past participle — the focus is on what happens, not who does it | is housed · be delivered · is done |
| Present perfect have/has + past participle — a past action that still matters now | have ordered · I've passed · have started |
Pronunciation to watch
The speaker uses 15 contractions and reduced forms, such as I've, they're, can't. Say them the short way, as you hear them.
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Start at 0.75× speed, shadow it sentence by sentence, then go back to normal speed once it feels easy.
- Record yourself and compare with the original, paying attention to words like hive, grid, bot.
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.