Shadowing Practice: How To Extract Your DNA At Home ๐ฎ - Learn English Speaking with Video
ืืืจ ืืฆื ืชืจืืื
ืื ืืฆื ืคืืชื ืืืจ ืชืจืืื ืืืกื ืืื.
8 ืืฉืคืืื
ืื ืืืฉืคืืื ืงืฆืจืื ืื ืืจืืืื ืืื, ืืืฅ ืขื ืขืจืื ืืื ืืืชืืื ืืืชื.
1
Take a sip of salt water, then swish it around your mouth really hard.
2
As it moves across your cheeks, it scrapes off thousands of loose cells.
3
Now spit the water into a cup and add a little dish soap.
4
The soap works the same way it does on dishes, breaking apart fat and grease.
5
And since the outside of your cells is wrapped in a fatty membrane, they split open.
6
Your DNA leaks out into the liquid, but you still can't see it.
7
So next, gently pour cold rubbing alcohol on top, which will pull the DNA out of the water and make the tiny strands clump together.
8
After a few minutes, you'll see cloudy white strings floating in the cup, and that is your DNA.
ืืืจื ืืคืืืงืฆืื
ืื ืื ืฉืืชื ืฆืจืื ืืื ืืืืจ ืืฉืืฃ
ืืืืืช AIืฆืืื ืืื ืืฉืคื
ืชืจืืื IPAืฉืืื ืืื ืฆืืื
ืืืฆืจ ืืืืืืื ื ืืช ืืืืจ ืืืืืื ืฉืื
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Vocabulary and speaking notes for this lesson
This B1 speaking lesson is built on the video โHow To Extract Your DNA At Home ๐ฎโ. This video has 8 sentences and 127 words to shadow. The speech runs for 0:43. The speaker talks at a natural 176 words per minute, close to everyday conversation.
Key vocabulary in this video
The 15 most advanced words in the video, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| soap noun | /soสp/ | A metallic salt derived from a fatty acid, commonly used in cleaning products. |
| dish noun | /dษชส/ | A vessel such as a plate for holding or serving food, often flat with a depressed region in the middle. |
| scrape verb | /skษนeษชp/ | To draw (an object, especially a sharp or angular one), along (something) while exerting pressure. |
| cloudy adjective | /หklaสฬฏdiห/ | Covered with or characterised by clouds. |
| strand noun | /หstษนรฆnd/ | Each of the strings which, twisted together, make up a yarn, rope or cord. |
| grease noun | /ษกษนis/ | Animal fat in a melted or soft state. |
| membrane noun | /หmษm.bษนeษชn/ | A mechanical, thin, flat flexible part that can deform or vibrate when excited by an external force. |
| spit verb | /spษชt/ | To evacuate (saliva or another substance) from the mouth, etc. |
| float verb | /flษสt/ | To be supported by a fluid of greater density (than the object). |
| cheek noun | /tอกสiหk/ | The soft skin on each side of the face, below the eyes; the outer surface of the sides of the oral cavity. |
| rub verb | /ษนสb/ | To move (one object) while maintaining contact with another object over some area, with pressure and friction. |
| gently adverb | /หdอกสษntli/ | Without strong force or quickness: softly, lightly. |
| leak noun | /liหk/ | A crack, crevice, fissure, or hole which admits water or other fluid, or lets it escape. |
| pour verb | /poษน/ | To cause (liquid, or liquid-like substance) to flow in a stream, either out of a container or into it. |
| wrap verb | /ษนรฆp/ | To enclose (an object) completely in any flexible, thin material such as fabric or paper. |
Phrasal verbs you will hear
| Word | Meaning |
|---|---|
| break apart verb | To dismantle something into its base components. |
ืืงืืืง ืืกืจืืื ืืื
ืืืื ืื ืฉืืืืืจ ืืฉืชืืฉ ืืื ืืื ืืจืื, ืขื ืืืืืื ืืืืืืงืืช ืืืกืจืืื:
| ืืื ื | ืืกืจืืื |
|---|---|
| ืกืืื (Passive voice) be + past participle โ ืืืืฉ ืืื ืขื ืื ืฉืงืืจื, ืื ืขื ืื ืฉืขืืฉื ืืช ืืคืขืืื | is wrapped |
| ืืฉืคืื ืืืงื (Relative clauses) who / which + clause โ ืืืืข ื ืืกืฃ ืขื ืืื ืื ืืืจ | top, which will |
| ืขืชืื ืขื โwillโ will + verb โ ืืืืื, ืืืืื ืื ื ืืืื ืืืื ืืขืชืื | will pull ยท you'll see |
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Start at 0.75ร 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 soap, dish, scrape.
ืืื ืืื ืืงืช ืืฉืืืืืื ื?
ืฉืืืืืื ื ืืื ืืื ืืงืช ืืืืืช ืฉืคื ืืืืกืกืช ืืืข ืฉืคืืชืื ืืืงืืจ ืืืืฉืจืช ืืชืืจืืื ืื ืืงืฆืืขืืื ืืคืืคืืืจืืช ืขื ืืื ืืคืืืืืืื ื"ืจ ืืืืกื ืืจ ืืจืืืืืก. ืืฉืืื ืคืฉืืื ืื ืขืืฆืืชืืช: ืืชื ืืงืฉืื ืืืืืื ืืื ืืืืช ืืืืืืช ืืืืืจ ืขืืื ืืงืื ืจื ืืื โ ืืื ืฆื ืืขืืงื ืืืจื ืืืืืจ ืขื ืขืืืื ืฉื 1โ2 ืฉื ืืืช ืืืื. ืื ืืืื ืืืืื ื ืคืกืืืืช ืื ืชืจืืืื ืืงืืืง, ืฉืืืืืื ื ืืืจืื ืืช ืืืื ืืืฉืจืืจืื ืืคื ืืขืื ืืืฉืืืจ ืืคืืกื ืืืืืจ ืืืืชืืื ืื ืืื ืืช. ืืืงืจืื ืืจืืื ืฉืื ืืฉืคืจ ืืฉืืขืืชืืช ืืช ืืืืง ืืืืืื, ืืืื ืืื ืฆืื, ืืงืฆื, ืืืืืืจ ืืืืืืจ, ืืื ืช ืืฉืืืขื ืืฉืืฃ ืืืืืืจ โ ืื ืฉืืืคื ืืืชื ืืืืช ืืฉืืืืช ืืืขืืืืช ืืืืชืจ ืืืื ื ืIELTS Speaking ืืืชืงืฉืืจืช ืืื ืืืืช ืืขืืื ืืืืืชื.