Shadowing Practice: How Distillation Columns Separate Chemicals - Learn English Speaking with Video
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Vocabulary and speaking notes for this lesson
This speaking lesson is built on the video “How Distillation Columns Separate Chemicals”. The speaker keeps coming back to these words: liquid, gas, chemical, boiling, tower. This video has 14 sentences and 204 words to shadow. The speech runs for 1:14. The speaker talks at a natural 166 words per minute, close to everyday conversation. 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 |
|---|---|---|
| liquid noun | /ˈlɪk.wɪd/ | A substance that is flowing, and keeping no shape, such as water; a substance of which the molecules, while not tending to separate from one another like those… |
| boil verb | /bɔɪ(ə)l/ | To heat to the point where it begins to turn into a gas. |
| mixture noun | /ˈmɪkst͡ʃɚ/ | The act of mixing. |
| bubble noun | /ˈbʌbəl/ | A spherically contained volume of air or other gas in a liquid, commonly a soapy liquid. |
| tray noun | /tɹeɪ/ | A small, typically rectangular or round, flat, and rigid object upon which things are carried. |
| pump noun | /pʌmp/ | A device for moving or compressing a liquid or gas. |
| gravity noun | /ˈɡɹævɪti/ | Of an activity such as a ceremony, a person's conduct, etc.: the quality of being deeply serious and solemn, especially in a dignified manner; seriousness… |
| identical adjective | /ɪˈdɛntɪkl̩/ | Bearing full likeness by having precisely the same set of characteristics; indistinguishable. |
| chill verb | /tʃɪl/ | To lower the temperature of something; to cool. |
| drain noun | /dɹiːn/ | A conduit allowing liquid to flow out of an otherwise contained volume; a plughole (UK) |
| stack noun | /stæk/ | A large pile of hay, grain, straw, or the like, larger at the bottom than the top, sometimes covered with thatch. |
| crude adjective | /kɹuːd/ | In a natural, untreated state. |
| columns noun | /ˈkɑləmz/ | pattern which involves throwing props in the air alternately. |
| swap verb | /ˈswɑp/ | To exchange or give (something) in an non-normal exchange (for something else). |
| horizontal adjective | /ˌhoɹəˈzɑn.təl/ | Perpendicular to the vertical; parallel to the plane of the horizon; level, flat. |
Phrasal verbs you will hear
| Word | Meaning |
|---|---|
| cool off verb | To decrease in temperature, activity, or temper. |
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 stacked |
Pronunciation to watch
- Long words — get the stress right: horizontal /ˌhoɹəˈzɑn.təl/, distillation /dɪstɪˈleɪʃən/
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 liquid, boil, mixture.
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.