Shadowing Practice: ngày 1 tháng 8, 2026 - Learn English Speaking with Video
Creating lesson...
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Exercise 3.
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Page 22.
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Mistakes that worked.
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Have you ever made a mistake that actually turned out to be something good?
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Believe it or not, a lot of things we use every day were simply accidents.
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Here are two of these amazing stories.
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Alexander Fleming, the Scottish scientist, was experimenting with bacteria in 1928.
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Being a rather sloppy scientist, he used to leave his culture plates all around his lab and then forget about them.
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One day after he returned from a vacation, he noticed that there was some mold on one of the bacteria samples, which had been left by an open window.
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He took a closer look and saw that there was something around the mold.
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This made him realize that the mold was able to destroy the harmful bacteria.
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That's how he discovered penicillin.
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Since then, his discovery has helped millions of people around the world recover from infections.
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Percy LeBaron Spencer, a self-taught engineer, was visiting a lab in 1946.
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As he stood in front of a magnetron, a power tube that drives a radar set,
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he noticed the chocolate bar in his pocket had started to melt.
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Spencer got curious.
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He sent a boy out for some popcorn kernels.
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When he held them near the magnetron, the popcorn exploded all over the lab.
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The next morning he brought in a kettle, cut a hole in the side, and put an egg into the pot.
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He then moved the magnetron against the hole and the egg burst.
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Spencer realized that we can use microwave radio signals to cook with, and he developed the microwave in 1947.
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Vocabulary and speaking notes for this lesson
This B1 speaking lesson is built on the video “ngày 1 tháng 8, 2026”. The speaker keeps coming back to these words: magnetron, mold, Spencer, bacteria, lab. This video has 22 sentences and 266 words to shadow. The speech runs for 2:14. The speaker talks at a steady 119 words per minute, a comfortable pace for shadowing. Only 76% of the words are among the 3,000 most common in English, so the vocabulary is demanding.
Key vocabulary in this video
The 15 most advanced words in the video, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| bacterium noun | /bækˈtɪəɹ.ɪəm/ | A single-celled organism with cell walls but no nucleus or organelles. |
| magnetron noun | /ˈmæɡ.nətˌtɹɑn/ | A device in which electrons are made to resonate in a specially shaped chamber and thus produce microwave radiation; used in radar, and in microwave ovens |
| mold noun | /moʊld/ | A natural substance in the form of a furry or woolly growth of tiny fungi that appears when organic material lies for a long time exposed to (usually warm and… |
| popcorn noun | /ˈpɑp.kɔɹn/ | A snack food made from corn or maize kernels popped by dry heating. |
| microwave noun | /ˈmaɪkɹoʊˌweɪv/ | An electromagnetic wave with wavelength between that of infrared light and radio waves. |
| scientist noun | /ˈsaɪəntəst/ | One whose activities make use of the scientific method to answer questions regarding the measurable universe. A scientist may be involved in original research… |
| penicillin noun | /ˌpɛn.ɪˈsɪl.ɪn/ | Any of a group of narrow-spectrum antibiotics obtained from Penicillium molds or synthesized, that have a beta-lactam structure and are active against… |
| kettle noun | /ˈkɛ.təl/ | A vessel for boiling a liquid or cooking food, usually metal and equipped with a lid. |
| kernel noun | /ˈkɝ.nəl/ | The core, center, or essence of an object or system. |
| sloppy adjective | /ˈslɑ.pi/ | Composed of or covered in slop; very wet. |
| explode verb | /ɪkˈsploʊd/ | To fly apart with sudden violent force; to blow up, to burst, to detonate, to go off. |
| melt verb | /mɛlt/ | To change (or to be changed) from a solid state to a liquid state, usually by a gradual heat. |
| harmful adjective | /ˈhɑɹmfl̩/ | Causing or likely to cause harm or damage; injurious. |
| burst verb | /bɜːst/ | To break from internal pressure. |
| radar noun | /ˈɹeɪˌdɑɹ/ | In full primary radar: a method of detecting a distant object and determining its position, velocity, or other characteristics by analysing radio waves… |
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 bacterium, magnetron, mold.
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.