تدريب Shadowing: Cambridge 15 listening (Test-1) (Part-4) - تعلم التحدث بالإنجليزية عبر الفيديو
جارٍ إنشاء الدرس...
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Part 4.
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You will hear a student giving a presentation about a type of tree known as the eucalyptus.
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which is common in Australia.
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First, You have some time to look at questions 31 to 40.
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Now listen carefully and answer questions 31 to 40.
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Today, I'm going to talk about the eucalyptus tree.
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This is a very common tree here in Australia, where it's also sometimes called the gum tree.
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First, I'm going to talk about why it's important.
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Then I'm going to describe some problems it faces at present.
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Right, well, the eucalyptus tree is an important tree for lots of reasons.
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For example, it gives shelter to creatures like birds and bats.
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And these and other species also depend on it for food, particularly the nectar from its flowers.
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So, it supports biodiversity.
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It's useful to us humans too because we can kill germs with a disinfectant made from oil extracted from eucalyptus leaves.
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The eucalyptus grows all over Australia, and the trees can live for up to 400 years.
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So, it's alarming that all across the country, numbers of eucalyptus are falling because the trees are dying off prematurely.
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So, what are the reasons for this?
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One possible reason is disease.
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As far back as the 1970s, the trees started getting a disease called mundula yellows.
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The tree's leaves would gradually turn yellow, then the tree would die.
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It wasn't until 2004 that they found the cause of the problem was lime,
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or calcium hydroxide, to give it its proper chemical name, which was being used in the construction of roads.
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The lime was being washed away into the ground and affecting the roots of the eucalyptus trees nearby.
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What it was doing was preventing the trees from sucking up the iron they needed for healthy growth.
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When this was injected back into the affected trees, they immediately recovered.
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But this problem only affected a relatively small number of trees.
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By 2000, huge numbers of eucalyptus were dying along Australia's east coast of a disease known as Bell Minor -associated dieback.
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The bell miner is a bird and the disease seems to be common where there are high populations of bell miners.
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Again, it's the leaves of the trees that are affected.
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What happens is that insects settle on the leaves and eat their way round them, destroying them as they go,
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and at the same time they secrete a solution which has sugar in it.
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Thank you.
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The bell miner birds really like this solution, and in order to get as much as possible,
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they keep away other creatures that might try to get it.
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So these birds and insects flourish at the expense of other species,
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and eventually so much damage is done to the leaves that the tree dies.
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But experts say that trees can start looking sick before any sign of bell minor -associated dieback.
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So it looks as if the problem might have another explanation.
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One possibility is that it's to do with the huge bushfires that we have in Australia.
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A theory proposed over 40 years ago by ecologist William Jackson is
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that the frequency of bushfires in a particular region affects the type of vegetation that grows there.
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If there are very frequent bushfires in a region, this encourages grass to grow afterwards,
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while if the bushfires are rather less frequent, this results in the growth of eucalyptus forests.
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So, why is this?
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Why do fairly frequent bushfires actually support the growth of eucalyptus?
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Well, one reason is that the fire stops the growth of other species which would consume water needed by eucalyptus trees. And there's another reason.
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If these other quick -growing species of bushes and plants are allowed to proliferate,
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they harm the eucalyptus in another way by affecting the composition of the soil and removing nutrients from it.
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So some bushfires are actually essential for the eucalyptus to survive,
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as long as they are not too frequent. In fact, there's evidence
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that Australia's indigenous people practised regular burning of bushland for thousands of years before the arrival of the Europeans.
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But since Europeans arrived on the continent, the number of bushfires has been strictly controlled.
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Now, scientists believe that this reduced frequency of bushfires to low levels has led to what's known as 'dry' rainforest,
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which seems an odd name as usually we associate tropical rainforest with wet conditions.
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And what's special about this type of rainforest?
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Well?
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Unlike tropical rainforest, which is a rich ecosystem, this type of ecosystem is usually a simple one.
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It has very thick, dense vegetation but not much variety of species.
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The vegetation provides lots of shade, so one species that does find it ideal is the bell -miner bird,
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which builds its nests in the undergrowth there.
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But again, that's not helpful for the eucalyptus tree.
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That is the end of part four.
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You now have one minute to check your answers to part four.
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السياق والخلفية
في هذا الفيديو، يتم تقديم عرض من قبل طالب يتحدث عن شجرة الأوكاليبتوس، وهي نوع شائع من الأشجار في أستراليا. يستعرض المتحدث أهمية هذه الشجرة، بالإضافة إلى المشاكل التي تواجهها في الوقت الحاضر. تتنوع الأمور التي يتم تناولها خلال العرض، حيث يشمل الحديث عن دور الأوكاليبتوس في دعم الحياة البرية، وكذلك التهديدات التي تعرّضت لها، مثل الأمراض والحرائق. هذه الموضوعات تمثل مزيجًا من المعلومات العلمية والحقائق التاريخية، مما يجعل هذا الفيديو مفيدًا لكل من يرغب في تحسين مستواه في اللغة الإنجليزية.
أفضل 5 عبارات للتواصل اليومي
- الشجرة الأوكاليبتوس شائعة في أستراليا. (The eucalyptus tree is common in Australia.)
- يوفر الأوكاليبتوس مأوى للكائنات الحية. (The eucalyptus provides shelter for wildlife.)
- تُستخدم زيوت الأوكاليبتوس كمطهرات. (Eucalyptus oils are used as disinfectants.)
- يؤثر مرض mundula yellows على أوراق الأوكاليبتوس. (The mundula yellows disease affects eucalyptus leaves.)
- الحرائق تساعد في نمو أشجار الأوكاليبتوس. (Fires help in the growth of eucalyptus trees.)
دليل خطوة بخطوة لتقنية الظلال
تقنية الظلال (shadowing) هي طريقة فعالة لتحسين النطق باللغة الإنجليزية. لمساعدتك في الاستفادة من محتوى هذا الفيديو، اتبع الخطوات التالية:
- استمع إلى الفيديو مرة واحدة: قبل أن تبدأ في ممارسة تقنية الظلال، استمع إلى الفيديو بالكامل لفهم الموضوع والمصطلحات المستخدمة.
- استخراج الفقرات الهامة: حدد الجمل أو العبارات الهامة التي تود التركيز عليها، مثل تلك الموجودة في القسم السابق.
- تفعيل تقنية التظليل: قم بتشغيل الفيديو مرة أخرى وبدأ في ترديد العبارات أثناء استماعك. حاول تقليد النغمة والإيقاع.
- التكرار: ارجع إلى العبارات التي تجد صعوبة في نطقها وقم بتكرارها عدة مرات، حيث أن تحسين النطق باللغة الإنجليزية يتطلب الممارسة المستمرة.
- تسجيل نفسك: استخدم جهاز تسجيل للاستماع لنفسك أثناء ممارسة الظلال. هذا يساعدك في ملاحظة أي أخطاء وتصحيحها.
باتباع هذه الخطوات، ستتمكن من تحسين مهاراتك في الظلال (shadow speak) بفعالية، مما سيدعم تعلمك للغة الإنجليزية بطريقة مفيدة وجذابة.
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 | being washed · was injected · are affected |
| جمل الوصل who / which + جملة — معلومة إضافية عن شخص أو شيء | name, which was · solution which has · rainforest, which is |
| المضارع التام have/has + اسم المفعول — حدث ماضٍ ما زال له أثر الآن | has been · has led |
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.