تدريب Shadowing: How is glass made? - تعلم التحدث بالإنجليزية عبر الفيديو
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72 جمل
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Hi, it's Doug.
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I recently came across this unbelievable video.
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It was taken at a hotel in Texas where on the roof of the hotel they have this pool
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that hangs off the edge and it has a glass bottom.
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Look at this.
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Would you go in there?
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Would you trust this glass?
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Someone named Benjamin has a question about glass.
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Let's give him a call now.
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Hi, Doug.
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Hi, Benjamin.
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I have a question for you.
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How is glass made?
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That's a great question.
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It's funny, right?
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Think about just how many objects around you are made of glass.
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Without glass, we'd have no windows, no windshields for our cars, no No drinking glasses or eyeglasses.
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No skyscrapers or smartphones.
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And yet, it's really not obvious at all where glass comes from.
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Like if you're sitting there and you have a table or a desk in front of you like this, that's wood.
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I'm guessing you know that wood comes from a tree.
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Or this statue here is carved from stone.
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You know where that comes from. But glass?
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Glass is a material that has to be made.
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How do they make it?
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Where does it come from?
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Before I say anything more, now would be a good time to pause the video and discuss.
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Okay, you ready?
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Well, believe it or not, Glass is made by taking a bunch of sand and getting it so hot that it melts.
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It's one of the most amazing things to watch how it's made because in order to melt sand, you have to use a special type of oven that can get super hot.
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It's called a furnace or a kiln.
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Here you can see someone loading some sand into the furnace.
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Once it gets hot enough, it will melt or become liquid.
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And when you get something this hot, you can see it glows, just like lava.
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This isn't lava though, it's molten sand.
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And as it cools, it will start to look more familiar to you.
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It becomes solid glass.
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To make a flat sheet of glass, like you'd use for a window, they melt sand until it's molten.
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Then they pour it out and roll it into a flat shape like this, and carefully allow it to cool.
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More fancy objects, like a glass vase, are even more fun to watch.
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This involves a special skill called glass blowing.
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You can see here, it starts with this person taking a big glob of molten sand
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and getting it on the end of a hollow pipe.
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Then she blows air into the pipe.
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You can actually blow a bubble into it, which might end up being the open part of the vase.
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The molten glass has a similar thickness as honey.
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They carefully shape it the way they want it and keep turning it and turning it.
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As it cools, it becomes solid.
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Artists can make amazing sculptures with glass.
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Believe it or not, this artist is making a glass swan.
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So that's how glass is made.
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But it's kind of weird, isn't it?
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I mean, how did people ever discover that if you melt sand, it makes glass?
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We've been making glass for a long time.
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So long ago now that no one knows for sure who was the first person to discover
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that if you melt sand it makes glass.
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But some of the earliest objects made of glass come from ancient Egypt, a place covered in desert sand.
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Could it be that someone long ago had a campfire
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and noticed that the heat of their fire melted the sand beneath it?
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No one knows for sure, but it's possible.
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That's all for this week's question.
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Thanks Benjamin for asking it.
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Now for the next episode, there's a lunar eclipse that's going to happen.
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I reached into my question jar and chose three questions about lunar eclipses that I'm thinking about answering.
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When this video is done playing, you'll get to vote on one.
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You can choose from, what's the difference between a solar and lunar eclipse?
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Why does the moon turn blood red during a lunar eclipse?
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Or where does the word eclipse come from?
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So submit your vote when the video's over.
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I wanna hear from all of you watching.
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There are mysteries all around us.
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Stay curious and see you next week.
تنزيل التطبيق
كل ما تحتاجه للتحدث بطلاقة
تقييم النطق بالذكاء الاصطناعيتقييم كل جملة
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المفردات وملاحظات التحدث لهذا الدرس
هذا الدرس في المحادثة بمستوى B1 مبني على الفيديو “How is glass made?”. أكثر الكلمات تكرارًا في الفيديو: glass, sand, melt, eclipse, molten. يحتوي هذا الفيديو على 72 جملة و728 كلمة للتدرب على الترديد. مدة الكلام 4:28. يتكلم المتحدث بسرعة طبيعية، نحو 163 كلمة في الدقيقة، قريبة من المحادثة اليومية. 82% من الكلمات ضمن أكثر 3,000 كلمة شيوعًا في الإنجليزية، ويُستحسن مراجعة الباقي قبل البدء. 14 من أصل 72 جملة هي أسئلة، لذلك يناسب التدرب على نبرة السؤال والإجابات القصيرة.
أهم المفردات في هذا الفيديو
أصعب 15 كلمة في الفيديو، مع النطق والمعنى:
| الكلمة | النطق | المعنى |
|---|---|---|
| melt فعل | /mɛlt/ | ذَابَ, انْصَهَرَ |
| eclipse اسم | /ɪˈklɪps/ | كُسُوف, خُسُوف |
| lunar صفة | /ˈlunɚ/ | قَمَرِيّ |
| vase اسم | /veɪ̯s/ | زَهْرِيَّة |
| lava اسم | /ˈlɑvə/ | حُمَم بُرْكَانِيَّة, لَابَة |
| pipe اسم | /ˈpaɪp/ | مِزْمَار |
| campfire اسم | /ˈkæmpˌfaɪ̯ɚ/ | نَار مُخَيَّم |
| skyscraper اسم | /ˈskaɪˌskɹeɪpɚ/ | نَاطِحَة سَحَاب |
| windshield اسم | /wɪnˈʃiːld/ | زُجَاج السَيَّارَة الأَمَامِيّ |
| thickness اسم | /ˈθɪknəs/ | سَمَاكَة |
| swan اسم | /swɑn/ | تَمّ, قُقْنُس |
| glow فعل | /ɡloʊ/ | أَشَعَّ |
| sculpture اسم | /ˈskʌlpt͡ʃɚ/ | تِمْثَال, مَنْحُوتَة |
| hollow صفة | /ˈhɑloʊ/ | أَجْوَف |
| pause اسم | /pɔːz/ | تَوَقُّف, وَقْف |
جمل تستحق التكرار
جمل قصيرة وكاملة من الفيديو يمكنك استخدامها في الحديث اليومي:
- Would you go in there?
- Would you trust this glass?
- Let's give him a call now.
- We've been making glass for a long time.
القواعد في هذا الفيديو
أكثر التراكيب التي يستخدمها المتحدث، مع العبارات نفسها من الفيديو:
| التركيب | في الفيديو |
|---|---|
| المبني للمجهول be + اسم المفعول — التركيز على ما يحدث لا على من يفعله | was taken · are made · is carved |
| صيغة التفضيل the -est / the most … — الأعلى أو الأدنى في مجموعة | the most amazing · the earliest |
| المضارع المستمر am/is/are + -ing — شيء يحدث الآن أو في هذه الفترة | you're sitting · I'm guessing · is making |
| المستقبل بـ “will” will + فعل — قرار أو وعد أو توقع | will melt · will start · you'll get |
نطق يحتاج إلى انتباه
يستخدم المتحدث 10 من الصيغ المختصرة، مثل I'm, isn't, wanna. انطقها بصيغتها القصيرة كما تسمعها.
- أصوات “th”: thickness /ˈθɪknəs/, beneath /bɪˈniːθ/
أصوات يجدها متحدثو العربية صعبة:
- /p/ — ليس /b/: انطقه مع نفخة هواء: eclipse /ɪˈklɪps/, pipe /ˈpaɪp/, campfire /ˈkæmpˌfaɪ̯ɚ/, skyscraper /ˈskaɪˌskɹeɪpɚ/, sculpture /ˈskʌlpt͡ʃɚ/
- /v/ — ليس /f/: مع اهتزاز الأوتار الصوتية: vase /veɪ̯s/, lava /ˈlɑvə/, oven /ˈʌ.vn̩/, unbelievable /ˌʌnbɪˈliːvəbl̩/, involve /ɪnˈvɑlv/
- تتابع الصوامت — لا تضف حركة بينها: melt /mɛlt/, eclipse /ɪˈklɪps/, campfire /ˈkæmpˌfaɪ̯ɚ/, skyscraper /ˈskaɪˌskɹeɪpɚ/, windshield /wɪnˈʃiːld/
كيف تتدرب بهذا الفيديو
- استمع إلى الفيديو كاملًا مرة واحدة دون أن تتكلم، ودوّن الكلمات التي لا تعرفها.
- ابدأ بسرعة 0.75×، وردّد جملة جملة، ثم عُد إلى السرعة العادية عندما يصبح الأمر سهلًا.
- سجّل صوتك وقارنه بالأصل، مع الانتباه إلى كلمات مثل melt, eclipse, lunar.
ما هي تقنية التظليل الصوتي؟
التظليل الصوتي (Shadowing) تقنية تعلم لغة مدعومة علمياً، طُورت أصلاً لتدريب المترجمين الفوريين المحترفين. الطريقة بسيطة لكنها قوية: تستمع لصوت إنجليزي أصلي وتكرره فوراً بصوت عالٍ — كظل يتبع المتحدث بتأخير 1-2 ثانية. تُظهر الأبحاث تحسناً كبيراً في دقة النطق والتنغيم والإيقاع وربط الأصوات والاستماع والطلاقة.