跟读练习: New Genetic Research May Make Tastier Tomatoes - 通过YouTube学习英语口语
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From VOA Learning English, this is the Agriculture Report.
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如果句子过短或过长，请点击 Edit 进行调整。
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From VOA Learning English, this is the Agriculture Report.
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Scientists have discovered the genetic secrets of two unpopular members of two favorite food families.
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They hope the discoveries will produce tastier tomatoes and stronger rice.
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The scientists discovered the complete set of genetic information of African rice and wild tomatoes.
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They published their studies in two reports in the journal Nature Genetics.
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There are good reasons African rice and wild tomatoes have not been popular.
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Asian rice is more productive and easier to process than African rice,
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and the wild tomato is poisonous.
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Rod Wing is a plant biologist at Arizona State University.
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He helped map the African rice genes.
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He says African rice can grow in salty and even poisonous soil.
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And it can also grow around weeds and in extremely dry conditions.
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He says this strength is increasingly important as climate change makes crop production more difficult.
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Scientists can now identify the genes that control what is good about African rice and combine those genes with Asian rice.
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They will be able to make better rice faster.
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The wild tomato also has some good qualities.
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Scientists found that it can grow in salty as well as very dry conditions like the African rice.
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The map identifies the genes that may be responsible for these qualities.
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Bjorn Usadel is with Germany's RWTH Aachen University,
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which also took part in the mapping.
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Mr. Usadel says researchers also found differences in the genes of wild and farm-grown tomatoes that taste and smell.
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He says this could help scientists improve the flavor of tomatoes.
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For VOA Learning English, I'm Laurel Bowman.
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为什么要通过这个视频练习口语？
通过观看这个视频，学习者可以在真实的语境中练习英语口语。这段关于科学研究的报道为提高英语发音提供了宝贵的素材。在观看视频时，不仅可以聆听标准的英语发音，还能了解生物学和农业相关的词汇，增强学习的趣味性和实用性。
在进行
shadow speech（影子语音）练习时，模仿发音和语调，可以帮助您提高英语口语表达能力。此外，通过对科学主题的讨论，学习者能够扩展自己的背景知识，这在日后的交流中能够更好地运用。
语法与表达方式分析
在此视频中，演讲者使用了几种关键的语法结构和表达方式，下面是一些值得注意的点：
- 被动语态：例如“genetic secrets have been discovered”，这一结构强调了发现的重要性而非施动者。
- 现在进行时：使用“ scientists are discovering”，这种用法强调了持续进行的动作，有助于让听众感受最近的研究进展。
- 条件句：如“if... then…”的结构，常用于假设的情况，可以帮助学生理解因果关系的表达。
- 名词性短语：比如“the complete set of genetic information”，这使得句子更加正式，有助于学术讨论的表达。
常见发音陷阱
在这个视频中，有一些发音较为复杂的单词和短语，是学习者在模仿时可能会遇到挑战的：
- “genetic”：注意发音中的重音位置，通常是第二个音节。
- “tomatoes”：因地区不同，发音可能有所差异。这里需要注意美国和英国的发音不同。
- “crop production”：两个词连读时可能会使得非母语者听起来不够流畅，练习时请特别注意标准发音。
通过对这些复杂词汇和表达方式的 shadow speak（影子说话）练习，学习者能够更大程度地提高自己的英语口语能力，掌握更高级的词汇和表达技巧。在日常交流中运用这些技巧，将大大增强您的自信心和流利度。
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。