Shadowing Practice: How 3D Printing Is Transforming The Auto Industry - Learn English Speaking with Video

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28 sentences

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3D printing.

It's a technology that's been around for decades, but is now increasingly being used by automakers to cut costs and save time.

Both the technology and the business cases have gotten stronger, enough to start installing machines in auto factories.

Automakers like Ford and Rivian are using 3D printing for prototypes, specialized tools, and even replacement parts.

Also known as additive manufacturing 3d printing builds an object from

a digital design adding material layer by layer depending on the machine

that material can be plastic ceramic or even something harder like metal

or carbon fiber composite rivian says

it has spent more than five million dollars on these types of machines materials for the operations

now cost about 1 .7 million per year

At the company's

Michigan Research and Development Center, smaller printers sit alongside industrial machines that can cost hundreds of thousands of dollars.

They make prototypes for design and testing, including electric motors, steering wheels, and other interior parts.

Rivian told CNBC the machines typically pay for themselves within a year just by saving on supplier tooling and logistics, and of course, time saved.

It's a similar story at Ford.

The company has increasingly used 3D printing as its factories.

At the River Rouge plant, where the automaker builds its crucial F -150 pickup truck, about two dozen printers produce thousands of tools,

including hood holders, torque bit sockets, and tools for smoothing adhesive.

When one of Ford's plants needed a large machining wheel to keep its operations going,

the company printed a temporary replacement while it waited for the production and delivery from a supplier.

Mercedes -Benz, Toyota and even EV startup

Slate also use 3D printing in their operations as well.

General Motors has even started using 3D printed parts for some

of its low -volume Cadillac vehicles such as a medallion on

a manual gear shifter marking the technology's growth from prototyping to production parts.

Executives believe the future for 3D printing like the parts

they build is limitless as machines continue to come down in cost and efficiency increases.

This is a production of WGBH.

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Vocabulary and speaking notes for this lesson

This speaking lesson is built on the video “How 3D Printing Is Transforming The Auto Industry”. The speaker keeps coming back to these words: printing, machine, parts, cost, automaker. This video has 28 sentences and 350 words to shadow. The speech runs for 2:27. The speaker talks at a steady 143 words per minute, a comfortable pace for shadowing. Only 71% of the words are among the 3,000 most common in English, so the vocabulary is demanding.

Key vocabulary in this video

15 words from the video worth learning, with pronunciation and meaning:

Word	Pronunciation	Meaning
prototype noun	/ˈpɹəʊtətaɪp/	An original form or object which is a basis for other forms or objects (particularly manufactured items), or for its generalizations and models.
replacement noun	/ɹɪˈpleɪsmənt/	A person or thing that takes the place of another; a substitute.
layer noun	/ˈleɪ̯ɚ/	A single thickness of some material covering a surface.
increasingly adverb		Increasing in amount or intensity.
printer noun	/ˈpɹɪntɚ/	One who makes prints.
supplier noun	/səˈplaɪə/	One who supplies; a provider.
auto noun	/ˈɔːtəʊ/	A setting for automatic operation.
temporary adjective	/ˈtɛmp(əˌɹ)ɛɹi/	Not permanent; existing only for a period or periods of time.
gear noun	/ɡɪɚ/	Equipment or paraphernalia, especially that used for an athletic endeavor.
alongside	/əˌlɔŋˈsaɪd/	Side by side with.
smooth adjective	/smuːð/	Having a texture that lacks friction. Not rough.
efficiency noun	/ɪˈfɪʃ.ən.si/	The extent to which a resource is used for the intended purpose.
manual noun	/ˈmæn.j(u)əl/	Synonym of handbook.
crucial adjective	/ˈkɹuː.ʃəl/	Essential or decisive for determining the outcome or future of something; extremely important; vital.
holder noun	/ˈhoʊɫdɚ/	A thing that holds.

Grammar in this video

The structures the speaker uses most, with the exact words from the video:

Structure	In the video
Present perfect have/has + past participle — a past action that still matters now	that's been · have gotten · has spent
Verb + -ing enjoy, keep, stop… + -ing — verbs that are followed by the -ing form	start installing · started using
Present continuous am/is/are + -ing — something happening right now or around now	is now increasingly being · are using

Pronunciation to watch

The “sh” and “zh” sounds: efficiency /ɪˈfɪʃ.ən.si/, crucial /ˈkɹuː.ʃəl/, specialize /ˈspɛʃəˌlaɪz/
Long words — get the stress right: temporary /ˈtɛmp(əˌɹ)ɛɹi/, efficiency /ɪˈfɪʃ.ən.si/

How to practise with this video

Listen to the whole video once without speaking and note the words you do not know.
Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
Record yourself and compare with the original, paying attention to words like prototype, replacement, layer.

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.

Shadowing technique: read the full step-by-step guide →

Shadowing Practice: How 3D Printing Is Transforming The Auto Industry - Learn English Speaking with Video

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