跟读练习: How smart are dolphins? - Lori Marino - 通过YouTube学习英语口语
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In 1985, three researchers on a dolphin-studying expedition got a little bored.
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In 1985, three researchers on a dolphin-studying expedition got a little bored.
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To lighten things up, one pretended to be Poseidon by placing a seaweed garland on his head and then throwing it into the ocean.
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Moments later, a dolphin surfaced with the seaweed crowning her head.
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Sure, this could have been a coincidence, but it's also entirely possible that the dolphin was mimicking the scientist.
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That's because dolphins are one of the smartest animals species on Earth.
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So exactly how smart are they?
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Like whales and porpoises, dolphins belong to the group of aquatic mammals known as cetaceans who comprise 86 different species, and share a common link with ungulates, or hoofed animals.
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Originally land mammals, the first cetaceans entered the water about 55 million years ago as large predators with sharp teeth.
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Then, a shift in ocean temperatures about 35 million years ago reduced the availability of prey.
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One group of cetaceans who survived this distruption, the odontocetes, wound up smaller with less sharp teeth, but also larger and more complex brains that allowed for complex social relationships, as well as echolocation to navigate and communicate.
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Jump ahead to the present, and modern dolphins’ brains are so large that their encephalization quotient— their brain size compared to the average for their body size— is second only to humans.
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Dolphins have evolved to survive through their ability to form complex social networks that hunt, ward off rivals, and raise offspring together.
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For example, one group of Florida dolphins practices a sophisticated form of cooperation to hunt fish.
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A dolphin designated as "the net-maker" kicks up mud while another gives the signal for the other dolphins to simultaneously line up and catch the escaping fish.
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Achieving a goal like this requires deliberate planning and cooperation, which, in turn, requires some form of intentional communication.
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Dolphins pass down their communication methods and other skills from generation to generation.
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Different dolphin populations exhibit variations in greetings, hunting strategies, and other behaviors.
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This sort of cultural transmission even extends to tool use.
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One group of bottlenose dolphins off the Australian coast nicknamed The Dolphin Sponge Club, has learned how to cover their rostrums with sponges when rooting in sharp corals, passing the knowledge from mother to daughter.
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Dolphins have even demonstrated language comprehension.
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When taught a language based on whistles and hand gestures, they not only understood what the signals meant, but that their order had meaning: the difference between bringing the ball to the hoop and bringing the hoop to the ball.
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So they were able to process two of the main elements of human language: symbols that stand for objects and actions, and syntax that governs how they are structured.
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Dolphins are also one of the few species who pass the mirror test.
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By recognizing themselves in mirrors, they indicate physical self-awareness, and research shows they can recognize not just their bodies, but also their own thoughts, a property called metacognition.
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In one study, dolphins comparing two sounds could indicate a same, different, or uncertain response.
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Just like humans, they indicated uncertainty more often with difficult trials, suggesting they're aware of what they know, and how confident they feel about that knowledge.
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But some of the most amazing things about dolphins are their senses of empathy, altruism, and attachment.
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The habit of helping injured individuals extends across the species barrier as evidenced by the many accounts of dolphins carrying humans to the surface to breathe.
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And like us, dolphins mourn their dead.
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When we consider all the evidence, we may wonder why humans still hunt dolphins for meat, endanger them through fishing and pollution, or imprison them to perform tricks.
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The ultimate question may not be whether dolphins are intelligent and complex beings, but whether humans can empathize with them enough to keep them safe and free.
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为什么要通过这个视频来练习口语？
通过观看这个视频，你将能够深入了解海豚的智力和行为。这不仅能够丰富你的词汇，还能提高你在实际交流中的自信心。由于海豚具备惊人的社交能力和合作精神，讨论这些动物的特性时，能帮助你学习使用表达观点、讲述事实和进行对比的口语技巧。运用"shadow speak"或"shadowspeak"的技巧，使你可以真实感受语言的韵律和语调，从而提升口语流利度。通过模仿视频中的发音和语速，不仅能够改善你的发音，还能增进你的听力理解能力。这是一种有效的学英语方式，帮助你在真实环境中应用所学习到的知识。
语法与表达在语境中的运用
在视频中，有几个关键的语法结构和表达方式可以帮助你改善口语能力：
- 被动语态：例如，“一群海豚被称为‘网制造者’”，这种句型强调了动作的接受者，对于表达你所观察到的现象非常有效。
- 描述性语言：使用形容词和副词来阐述海豚的特征，比如“复杂的社交网络”，这样的表达能够让对话更生动。
- 因果关系：如“海洋温度的变化导致猎物减少”，这样的结构帮助你讨论因果关系时更加流畅。
- 比较结构：比如“与人类相比，海豚的脑容量相对较大”，这种结构在比较中非常有效，适合在辩论时使用。
常见的发音陷阱
在视频中，有几个发音挑战值得注意：
- “海豚”（dolphin）：这个词的发音可能会让非母语者感到困扰，尤其是重音的位置和元音的发音。
- “智力”（intelligence）：这个词的重音位置可能不太明确，练习时可以尝试将其分解为音节。
- “同情”（empathy）和“无私”（altruism）：这两个词的不常用性可能导致发音不准确，反复练习会有所帮助。
利用"shadow speech"技巧来练习这些词汇，有助于提高你在日常交流中的自信，同时也增进你的听力理解。通过这样的练习，你将在"看YouTube学英语"的过程中发现自己的进步。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。