跟读练习: How did detectives solve the case of the bloody motel? - Theodore E. Yeshion - 通过YouTube学习英语口语
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Officer Stone approaches the dimly lit motel he’s been called to investigate.
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Officer Stone approaches the dimly lit motel he’s been called to investigate.
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Outside the shattered windows and broken door, the motel manager tells him the room was rented to Frank Carter, who was last seen entering the motel three nights earlier.
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While Carter doesn't have the cleanest record, he's never been arrested for a violent crime before.
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Yet as Stone scans the crime scene, he sees a disorderly room, visible red-brown stains and a partial shoe track.
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All these details hint at a bloody struggle, but there aren't enough clues to say exactly what happened.
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After calling in a detective and a crime scene investigation team to inspect, photograph, sketch, measure, and collect all the obvious evidence, the investigators decide their next move.
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It's time to apply luminol.
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Luminol, also known as 3-aminophthalhydrazide, was first introduced as an investigative tool in 1937 by a German forensic scientist named Dr. Walter Specht.
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Almost a decade earlier, research found that when mixed in a solution with an oxidizing agent and exposed to certain compounds, luminol molecules rapidly oxidize, become excited, and emit a faint blue-white glow as they return to their normal state.
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This process is called chemiluminescence, and Specht discovered he could trigger it by exposing luminol to hemoglobin, a protein found in red blood cells.
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So by spraying the solution in a dark crime scene, he could illuminate even the faintest traces of blood.
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This is what Officer Stone is hoping to do back at the motel.
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The lights are switched off, and the forensic team sprays luminol across the walls, floor, and ceiling.
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The chemiluminescence only lasts about 30 seconds, so our investigators need to keep spraying as they track blood through the crime scene.
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But if they find a trail, the specific patterns of blood could help reconstruct what might have happened.
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In some crime scenes, luminol might reveal footprints or drag marks.
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It can show larger drips associated with slowly bleeding wounds, or fine spatter suggesting high-impact wounds from firearms or motorized tools.
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The absence of a reaction can be just as informative, indicating when people or objects blocked blood from hitting a surface.
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And since luminol will react even if the blood is extremely diluted, it's almost impossible to clean a bloody crime scene well enough to prevent chemiluminescence.
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In fact, a skilled investigator can even use these lingering patterns to identify attempts at blood removal.
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In this case, Officer Stone finds spattered spots of blue light on the floor, suggesting an impact wound and a struggle.
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Shoe track impressions and a glowing handprint on the kitchen countertop line up with the drag mark on the floor.
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Following the trail from the foot of the bed, the investigators end up in the parking lot, suggesting the victim was placed inside a vehicle.
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These stains make a strong case for the narrative revealed by luminol.
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But investigators have to be careful since the chemical’s high sensitivity is a double-edged sword.
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Not only does luminol react to very old bloodstains, with some cases showing chemoluminescence on objects thousands of years old, it can also react to cleaning agents like bleach or materials containing copper.
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This is why luminol is what's called a presumptive blood test.
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It indicates the possible presence of blood, but a confirmatory test with chemicals that only react to hemoglobin must be done to prove it.
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If a positive reaction for blood is confirmed, however, DNA tests can be especially useful for identifying and eliminating potential suspects.
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Officer Stone submitted a DNA sample from the motel for that exact purpose, and the results found exactly the clue he needs.
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The blood belongs to Frank Carter, suggesting that he may be the victim, not the culprit.
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Stone is mulling over this new evidence when he gets a call from a local state trooper.
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After pulling over an erratic driver, the trooper noticed what appeared to be bloodstains on the rear bumper.
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The car's trunk was empty, but luminol testing later revealed traces of blood throughout the car.
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One more DNA test confirms Stone’s suspicions: Carter was the victim.
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And faced with this overwhelming evidence, the car’s driver confessed to the crime.
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Shadowing English
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关于本节课程
在本节课程中，学习者将通过观看关于侦探如何解决血腥汽车旅馆案件的视频，实践有关犯罪调查和证据收集的英语语言。这段对话将帮助您提高对复杂语言结构的理解，同时学习与警方调查相关的特定词汇。这也是一个很好的机会，让您在Shadowing技巧的帮助下练习英语发音。您可以通过模仿视频中的对话和语气，提升您的听力和口语能力，借此提高英语水平。
关键词汇与短语
- 血腥 (bloody) - 描述现场的情绪和情况。
- 犯罪现场 (crime scene) - 侦查的关键地点。
- 光谱测试 (luminol test) - 侦探用来发现血迹的一种化学反应。
- 证据 (evidence) - 用于支持调查的材料。
- 影响伤口 (impact wound) - 表示受害者受到剧烈攻击的伤口类型。
- 拖拽痕迹 (drag mark) - 可能揭示受害者被移动的证据。
- DNA测试 (DNA test) - 一种用于确认身份的生物证据技术。
- 嫌疑人 (suspect) - 被怀疑参与犯罪的人。
练习技巧
在观看此视频时，建议您运用shadow speech技巧。尝试在视频播放时跟读，尤其是在说话速度较慢和语调富有感染力的部分。您可以反复播放难以跟上的段落，通过shadowspeak训练您的发音。务必注意侦探石警官的语气变化和情感表达，这不仅能帮助您提高英语发音，还能提升您对情感语调的理解。
您可以在shadowing site上找到更多相似的练习材料，帮助您在学习中获得更好的反馈。此方法能够显著提升您对日常英语对话的熟悉程度，特别是在观看看YouTube学英语时，您将能够更深入地掌握影片中使用的语言。同时，利用这些技巧，您也能有效地提高英语发音，增强与他人的交流能力。
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。