शैडोइंग अभ्यास: Why are some animals black and white? ⏲️ 6 Minute English - YouTube के साथ अंग्रेजी बोलना सीखें

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6 Minute English from BBC Learning English.
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6 Minute English from BBC Learning English.
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Hello, this is 6 Minute English from BBC Learning English.
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I'm Neil.
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And I'm Becca.
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Neil, what do the following animals have in common?
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Zebras, giant pandas and magpies.
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That's pretty easy, Becca.
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They're all black and white.
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Right.
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But do you know why these animals evolved to be black and white?
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Mmm, I'm not so sure.
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Probably something about survival.
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That's usually the answer, isn't it?
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It is.
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The animal world is full of colour,
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shiny blue peacocks and bright green frogs.
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But in fact, hundreds of animal species are black and white.
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In this episode, we'll try to find out why,
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while also learning some useful new words and phrases.
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And remember, all the vocabulary from this episode is available on our website, bbclearningenglish.com.
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OK, time for a question for you, Becca.
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According to one theory, some animals are black and white to warn potential predators that they're dangerous or they taste bad.
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But what is the scientific term for this?
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Is it a camouflage, b mimicry or c aposomatism?
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Well, Neil, I'm going to go with c just because I've never heard of that word before.
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OK, I like...
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I like your style.
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Some scientists think zebra's distinctive black and white stripes prevent bites from flies and other insects.
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Zoologist Dr Martin Howe tested this theory by covering horses,
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a close relative of the zebra, in stripes.
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Here Martin discusses his experiment with Caroline Steele from BBC World Service programme CrowdScience.
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Do we know what it is about the stripes that's putting them off?
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Is it somehow like visually confusing?
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We originally set out to test whether maybe there were these optical illusions at play.
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So we did a whole bunch of tests where we tried different patterns of rugs,
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but it turned out that practically every high contrast pattern,
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every black and white pattern we used,
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almost every pattern was really effective at stopping flies.
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Martin conducted a whole bunch of,
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meaning a lot of, tests using different colours and patterns.
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Black and white stripes created an optical illusion – a visual trick
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that makes your eyes see things differently from how they really are.
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As a result, the flies were put off.
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They lost interest and didn't bite.
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So zebras' stripes confuse insects,
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telling them to look elsewhere for food.
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But are there other reasons animals are black and white?
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Nobody who's seen giant pandas in a zoo would find them hard to spot.
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Against a grassy background they stand out easily.
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But seen from a distance in the snowy mountain forest where they live,
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black and white makes the perfect disguise.
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Here's Professor Tim Caro, a world authority on animal behaviour,
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explaining more to Caroline Steele for BBC World Service's CrowdScience.
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The giveaway for me was 15 photos of giant pandas taken either fairly close up or at a distance.
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And in two of those photos,
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I was unable to see anything in the picture other than rocks and snow.
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And then later on, I realised that,
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in fact, there was a giant panda in the centre of that picture some distance away.
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Immediately that clicked in my mind.
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The pandas were so well camouflaged,
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Tim couldn't spot them in the photos.
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That's when something clicked in his mind – a phrase used when you suddenly understand something after trying for a long time.
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Tim understood that pandas use colour to hide.
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He calls this a giveaway – something that makes it easy for people to discover something secret or unknown.
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So, are animals black and white to repel insects, like zebras?
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Or for camouflage, like pandas?
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Let's give the final word to Hannah Rowland,
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a researcher into another black and white animal – penguins.
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Really, science never has a black and white answer.
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Excuse the pun, with penguins being black and white.
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It's often a very complex mixture of reasons.
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The answer to why animals are black and white is not black and white.
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A situation described as black and white means one where it's easy to understand what's right and wrong.
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In fact, there's no one reason why animals are black and white.
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Zebras avoid bites, pandas hide from predators,
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and some animals, like skunks,
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warn other animals they're dangerous.
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It all depends on the specific animal.
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And talking of skunks reminds me of my question, Becca.
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According to one theory, some animals are black and white to warn potential predators they're dangerous or taste bad.
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But what is the scientific term?
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And I chose C, aposomatism,
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because I'd never heard of it before.
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Well, that's a great way of choosing.
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And it's done well for you because you're correct.
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Woohoo!
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OK, let's recap the vocabulary we've learned,
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starting with optical illusion, a visual trick where your eyes perceive things differently from how they really are.
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A whole bunch of something means a lot of something.
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If something puts you off,
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it causes you to dislike it or lose interest.
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A giveaway is something that makes it easy for people to discover something secret or unknown.
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The phrase, something clicked in my mind,
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is used when you suddenly understand something at last.
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And finally, if you describe something as black and white,
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you mean it's easy to understand what is right and wrong.
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Once again, our six minutes are up!
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But head over to our website,
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bbclearningenglish.com, for a quiz and worksheet for this episode.
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See you there soon, but for now it's goodbye.
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Goodbye!

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इस पाठ के बारे में

इस पाठ में, आप जानेंगे कि कुछ जानवर काले और सफेद क्यों होते हैं। हम जानवरों की इस रंग संरचना के पीछे के वैज्ञानिक विचारों के बारे में चर्चा करेंगे। इससे न केवल आपके अंग्रेजी बोलने की क्षमता की वृद्धि होगी, बल्कि आप इस विषय के आसपास महत्वपूर्ण शब्दावली और वाक्यांशों को भी सीखेंगे। आपके लिए यह एक बेहतरीन अवसर है कि आप यूट्यूब से अंग्रेजी सीखें और विज्ञान के अद्भुत पहलुओं के बारे में जानें।

मुख्य शब्दावली और वाक्यांश

  • अवलोकन: जांच या देखना, जैसे कि जानवरों का अध्ययन करना।
  • सर्पिल: विशेष पैटर्न, जैसे कि ज़ेबरा के धारियां।
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  • जोखिम: संभावित खतरा या नुकसान।
  • ऑप्टिकल भ्रम: एक दृश्य धोखा जो आपकी आँखों को धोखा देता है।
  • संरचना: किसी वस्तु का बनावट या उसका तरीका।
  • भ्रमण: दूर से देखने पर चीजों का अलग दिखना।

अभ्यास टिप्स

जब आप इस वीडियो के साथ अंग्रेजी शैडोइंग का अभ्यास करते हैं, तो ध्यान रखें कि इसकी गति मध्यम है। आप वीडियो को बार-बार सुनकर संवाद के टोन और स्पीड का अभ्यास कर सकते हैं। पहले, केवल सुनें और समझें, फिर shadowspeak तकनीक का उपयोग करें जहां आप एक साथ बोलने का प्रयास करते हैं। यह आपको आपकी उच्चारण, ताल और विश्वास को सुधारने में मदद करेगा। सही उच्चारण और लय को पकड़ने के लिए प्रयास करें। हमेशा याद रखें कि अंग्रेजी बोलने का अभ्यास नियमित रूप से करें और धीरे-धीरे अपनी गति बढ़ाएँ। इस प्रकार, आप न केवल इस विषय पर जानकारी प्राप्त करेंगे, बल्कि अंग्रेजी बोलने में भी दक्षता हासिल करेंगे।

शैडोइंग तकनीक क्या है?

शैडोइंग (Shadowing) एक विज्ञान-समर्थित भाषा सीखने की तकनीक है जो मूल रूप से पेशेवर दुभाषिया प्रशिक्षण के लिए विकसित की गई थी। विधि सरल लेकिन शक्तिशाली है: आप मूल अंग्रेज़ी ऑडियो सुनते हैं और तुरंत इसे ज़ोर से दोहराते हैं — जैसे वक्ता की छाया 1-2 सेकंड की देरी से। शोध से पता चलता है कि यह उच्चारण सटीकता, स्वर, लय, जुड़ी हुई ध्वनियाँ, सुनने की समझ और बोलने की प्रवाहशीलता में काफ़ी सुधार करता है।

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