跟读练习: Carolyn Porco: Could a Saturn moon harbor life? - 通过YouTube学习英语口语
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Two years ago here at TED I reported that we had discovered at Saturn, with the Cassini Spacecraft, an anomalously warm and geologically active region at the southern tip of the small Saturnine moon Enceladus, seen here.
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Two years ago here at TED I reported that we had discovered at Saturn, with the Cassini Spacecraft, an anomalously warm and geologically active region at the southern tip of the small Saturnine moon Enceladus, seen here.
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This region seen here for the first time in the Cassini image taken in 2005. This is the south polar region, with the famous tiger-stripe fractures crossing the south pole.
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And seen just recently in late 2008, here is that region again, now half in darkness because the southern hemisphere is experiencing the onset of August and eventually winter.
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And I also reported that we'd made this mind-blowing discovery -- this once-in-a-lifetime discovery of towering jets erupting from those fractures at the south pole, consisting of tiny water ice crystals accompanied by water vapor and simple organic compounds like carbon dioxide and methane.
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And at that time two years ago I mentioned that we were speculating that these jets might in fact be geysers, and erupting from pockets or chambers of liquid water underneath the surface, but we weren't really sure.
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However, the implications of those results -- of a possible environment within this moon that could support prebiotic chemistry, and perhaps life itself -- were so exciting that, in the intervening two years, we have focused more on Enceladus.
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We've flown the Cassini Spacecraft by this moon now several times, flying closer and deeper into these jets, into the denser regions of these jets, so that now we have come away with some very precise compositional measurements.
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And we have found that the organic compounds coming from this moon are in fact more complex than we previously reported.
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While they're not amino acids, we're now finding things like propane and benzene, hydrogen cyanide, and formaldehyde.
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And the tiny water crystals here now look for all the world like they are frozen droplets of salty water, which is a discovery that suggests that not only do the jets come from pockets of liquid water, but that that liquid water is in contact with rock.
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And that is a circumstance that could supply the chemical energy and the chemical compounds needed to sustain life.
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So we are very encouraged by these results.
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And we are much more confident now than we were two years ago that we might indeed have on this moon, under the south pole, an environment or a zone that is hospitable to living organisms.
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Whether or not there are living organisms there, of course, is an entirely different matter.
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And that will have to await the arrival, back at Enceladus, of the spacecrafts, hopefully some time in the near future, specifically equipped to address that particular question.
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But in the meantime I invite you to imagine the day when we might journey to the Saturnine system, and visit the Enceladus interplanetary geyser park, just because we can.
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Thank you. (Applause)
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本課程介紹
在本課程中，您將根據Carolyn Porco的演講，練習聽力和口說能力。透過這段有關於土星衛星恩克拉多斯可能存在生命的探討，您將學會如何運用相關的科學詞彙並提升您的英語發音。這段影片節奏適中，適合進行英语影子跟读 (shadowspeak) 練習。
重要詞彙與短語
- anomalously warm - 異常溫暖
- geologically active - 地質活動的
- jets erupting - 噴發的噴流
- water vapor - 水蒸氣
- organic compounds - 有機化合物
- prebiotic chemistry - 原生物化學
- liquid water - 液態水
- hospitable to living organisms - 對生物體友好的
練習技巧
當您觀看這段影片時，嘗試進行随者影子跟讀 (shadow speech)，這是一種有效的提升口說流利度的技巧。首先，先聽一小段，理解其內容。接著，重複演講者所說的句子，注意語調和節奏。Carolyn Porco的語速適中，您可以逐句模仿，加強口音和發音。這樣的練習能有效幫助您改善語音的準確性，並增強您的自信心。
如有需要，您可以重複播放某些片段，並在新出現的詞語中標註英文，幫助您更好地掌握新的詞彙。專注於關鍵詞彙的發音，將其融入到日常對話中，從而使您的英語更加自然流暢。利用看YouTube学英语的方式，差不多每次觀看都可以找到新的學習重點。希望您能通過這些練習，發現學習英語的樂趣！
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。