跟读练习: Science in English #3 | The Periodic Table - 通过视频学习英语口语

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57 句
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Ahem.
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Good morning, everyone.
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Today we are going to learn about the periodic table.
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Think of it as a map of all known elements.
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Just like a map helps you find places, the periodic table helps scientists organize the building blocks of matter.
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Let's get started.
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Let's begin with a simple comparison.
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The English language has only 26 letters.
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Yet, those 26 letters can create millions of words and sentences.
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Nature is very similar.
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About 118 elements combine to create everything around us.
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So where can we find all these elements?
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We can find them in the periodic table.
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Let's begin with our learning objectives.
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By the end of this lesson, you will understand what the periodic table is.
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You will learn about atomic number and atomic mass.
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You will also identify groups and periods.
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Finally, you will recognize metals, nonmetals, and metalloids.
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So what is the periodic table?
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It is a chart that organizes all known elements.
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Each element has four important pieces of information.
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Its name, its chemical symbol, its atomic number, and its atomic mass.
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Now let's look more closely at these numbers.
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The atomic number is like an ID card.
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It tells us exactly which element it is.
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For example, hydrogen has an atomic number of one.
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Carbon has an atomic number of six.
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has an atomic number of 1.
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Carbon has an atomic number of 6.
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Gold has an atomic number of 79.
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The atomic mass tells us how heavy an atom is compared with a hydrogen atom.
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Not all elements are the same.
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Scientists divide them into three main categories.
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Metals Metals are usually shiny and conduct electricity well.
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Nonmetals do not conduct electricity well.
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Metalloids have properties of both metals and nonmetals.
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Each category has its own unique properties.
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Now let's learn how to read the periodic table.
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The horizontal rows are called periods.
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The vertical columns are called groups.
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Here is an important idea.
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Elements in the same group have similar properties.
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They behave in similar ways during chemical reactions.
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Let's look at a few examples.
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Group 1 contains the alkali metals.
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They are very reactive.
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Group 17 contains the halogens.
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They are reactive non-metals.
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Group 18 contains the noble gases.
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These elements are very stable and rarely react with other elements.
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Let's review what we have learned today.
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The periodic table organizes all known elements.
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Each element has an atomic number and an atomic mass.
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The table is arranged into periods and groups.
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Elements in the same group have similar properties.
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The periodic table helps scientists understand and compare all known elements.
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Thank you for listening.

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本课的词汇与口语要点

这节 B1 级别的口语课以视频“Science in English”为素材。 视频中反复出现的词有：element, atomic, table, periodic, metals。 这段视频共有 57 个句子、427 个单词可供跟读。 讲话部分时长为 3:40。 说话人语速平稳，每分钟约 117 个词，很适合跟读。 只有 81% 的单词属于英语最常用的 3,000 词，词汇难度较高。

视频中的重点词汇

视频中最难的 15 个单词，附发音和释义：

单词发音释义
atomic 形容词/əˈtɑː.mɪk/原子
periodic 形容词/ˌpɪɹiˈɑdɪk/週期的 /周期的
organize 动词/ˈɔɹɡənaɪz/組織 /组织
scientist 名词/ˈsaɪəntəst/科學家 /科学家
metalloid 名词/ˈmɛtəlɔɪd/類金屬 /类金属, 半金屬 /半金属
atom 名词/ˈætəm/原子
hydrogen 名词/ˈhaɪdɹəd͡ʒ(ə)n/氫 /氢
alkali 名词/ˈæl.kəˌlaɪ/鹼 /碱
halogen 名词/ˈhæl.ə.d͡ʒən/鹵素 /卤素, 鹵族 /卤族
horizontal 形容词/ˌhoɹəˈzɑn.təl/水平, 橫的 /横的
behave 动词/bɪˈheɪv/為人 /为人
arrange 动词/əˈɹeɪnd͡ʒ/安排, 佈置 /布置
divide 动词/dɪˈvaɪd/分, 分裂
combine 动词/kəmˈbaɪn/結合 /结合, 組合 /组合
vertical 形容词/ˈvɝ.tɪ.kəl/豎的 /竖的, 垂直

值得反复跟读的句子

视频中简短而完整的句子，可以直接用在日常对话里：

  • Let's begin with a simple comparison.
  • Let's begin with our learning objectives.
  • Let's look at a few examples.
  • Let's review what we have learned today.

视频中的语法

说话人最常用的结构，并附上视频中的原话：

结构视频中的用法
被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的is compared · are called · is arranged
“will” 表将来 will + 动词 — 决定、承诺或预测will understand · will learn · will also identify

需要注意的发音

  • 长单词——注意重音位置: periodic /ˌpɪɹiˈɑdɪk/, horizontal /ˌhoɹəˈzɑn.təl/

中文母语者容易读错的音：

  • /v/ — 不要读成 /w/，上齿轻触下唇: reactive /ɹiːˈæktɪv/, behave /bɪˈheɪv/, divide /dɪˈvaɪd/, vertical /ˈvɝ.tɪ.kəl/
  • 词尾辅音 — 要读清楚，后面不要加元音: atomic /əˈtɑː.mɪk/, periodic /ˌpɪɹiˈɑdɪk/, organize /ˈɔɹɡənaɪz/, scientist /ˈsaɪəntəst/, metalloid /ˈmɛtəlɔɪd/
  • /æ/ — 嘴张大，不要读成 /e/: reactive /ɹiːˈæktɪv/, atom /ˈætəm/, alkali /ˈæl.kəˌlaɪ/, halogen /ˈhæl.ə.d͡ʒən/, react /ɹiːˈækt/

如何用这段视频练习

  1. 先完整听一遍视频，不要开口，记下不认识的单词。
  2. 用正常速度逐句跟读，每句重复到你的节奏与说话人一致为止。
  3. 录下自己的声音并与原声对比，特别注意 atomic, periodic, organize 这类单词。

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。

影子跟读法: 阅读完整分步指南 →