跟读练习: The Technology Report: Can Batteries Last Forever? - 通过YouTube学习英语口语
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Music From VOA Learning English,
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this is the Technology Report.
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Mia Le Thay is a scientist at the University of California, Irvine.
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She recently discovered a process that could result in batteries lasting forever.
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Ty spoke with VOA Learning English about her discovery.
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She said she was not happy with the lithium-ion batteries in her wireless devices.
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She said that over time,
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they lose their ability to fully charge.
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She said this is because the batteries use nanowires.
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The small wires are extremely thin.
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A human hair is a thousand times thicker than a nanowire, for example.
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As a result, nanowires break easily.
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But they are also effective carriers of electricity.
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Tai had a theory.
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nanowires might last longer if covered.
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She and her team at Irvine experimented with many coverings.
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They found success with PMMA,
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a hard, clear, plastic material.
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The nanowires covered with PMMA cycled through charges 28 times more then uncovered nanowires.
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The PMMA covered wires showed no evidence of damage after 200,000 cycles.
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The results suggest that batteries with covered nanowires might last forever.
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For VOA Learning English, this is the last technology report for Learning English TV.
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But we are not going away.
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We will continue to bring you videos to help you learn American English.
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Go to learningenglish.voanews.com to find new materials and to look for past Learning English TV reports.
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I'm Carolyn Prasuti.
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Thank you for watching and learning with VOA Learning English.
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Thank you.
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背景与上下文
在这期科技报告中，来自加州大学欧文分校的科学家米娅·勒泰分享了关于电池新发现的细节。她对无线设备中使用的锂离子电池感到不满，认为这些电池随着时间的推移失去了充电能力。这一问题的核心在于纳米线的使用，纳米线非常细，甚至比人类头发还要细一千倍，这使得它们容易断裂。然而，米娅也提出了一个理论，认为如果为纳米线覆盖保护层，它们的使用寿命可能会延长。她团队的实验结果显示，覆盖了PMMA材料的纳米线在经历200,000次充电循环后没有任何损害，这可能使得电池实现“永续”使用成为可能。
日常交流的五个关键短语
- “我对锂离子电池不满意。” - 表达对产品的不满意。
- “纳米线非常细。” - 解释纳米线的特性。
- “我们进行了很多实验。” - 描述科学研究过程。
- “结果表明...” - 引入研究结果的重要性。
- “感谢您的观看。” - 结束语，表示感谢。
逐步影子跟读指南
为了提升英语口语能力，您可以通过英语影子跟读的方式，针对本视频内容进行练习。具体步骤如下：
- 首先，观看视频并认真听每一句话，理解其含义。
- 分段播放，并将每一句话暂停。重复模仿发音和语调，尽量与原声视频保持一致。
- 使用shadowspeak技巧，在复述时注意音调、节奏和情感表达。这能够有效提升口语流利度。
- 尝试将学到的短语运用到自己的日常对话中，例如在进行雅思口语练习时，可以运用第一步提到的短语。
- 最后，录制自己的声带与原视频进行对比，找出不足之处并加以改进。
通过这样的练习，您不仅能够掌握科学术语，还能增强对复杂概念的表达能力。继续进行影子跟读，相信您的英语水平会有显著提升。
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。