跟读练习: Changing the Size of Shadows - 通过视频学习英语口语
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18 句
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Sources of Light Shadows How can we change the size of a shadow?
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A shadow is the dark shade made when an object blocks the path of light.
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There must be a source of light in order to cast a shadow.
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For example, you might have noticed that your body casts a shadow on the pavement on a sunny day.
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That's because the sun is a source of light, and your body stops the sunlight from reaching the pavement.
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Shadows come in different shapes and sizes, and can be observed wherever there is a source of light, day or night.
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Let's explore what happens to an object's shadow when it is moved closer to and further away from a source of light.
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Here we have a flashlight and a lion.
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When we turn the flashlight on, a shadow is produced as the lion blocks the path of light.
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We'll move the lion further away from the source of light.
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The shadow is now smaller.
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What do you think will happen when we move the lion closer to the source of light?
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Yes, the shadow gets bigger.
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How do you think the shadow will change if we move the source of light instead of the object?
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Let's have a look.
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If we move the source of light closer towards the lion, the shadow grows bigger.
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If we move the flashlight further away from the lion, the shadow grows smaller. That was fun!
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See you next time!
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本课的词汇与口语要点
这段视频共有 18 个句子、245 个单词可供跟读。 讲话部分时长为 1:56。 说话人语速平稳，每分钟约 127 个词，很适合跟读。 79% 的单词属于英语最常用的 3,000 词，其余的词建议在练习前先学一下。
视频中的重点词汇
视频中 15 个值得学习的单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| shadow 名词 | /ˈʃædəʊ̯/ | йинзы, йинйинзы |
| lion 名词 | /ˈlaɪən/ | сызы, 獅 /狮 |
| explore 动词 | /ɪkˈsploɹ/ | 探索, 探險 /探险 |
| wherever | /(h)wɛɹˈɛvɚ/ | 無論何處 /无论何处 |
| shade 名词 | /ʃeɪd/ | 陰影 /阴影 |
| sunny 形容词 | /ˈsʌni/ | 晴朗 |
| observe 动词 | /əbˈzɜːv/ | 遵守, 遵循 |
| sunlight 名词 | /ˈsʌnˌlaɪt/ | 陽光 /阳光, 日光 |
| flashlight 名词 | /ˈflæʃˌlaɪt/ | 手電筒 /手电筒, 電筒 /电筒 |
| object 名词 | /ˈɑb.d͡ʒɛkt/ | 物體 /物体, 物件 |
| block 名词 | /blɑk/ | 塊體 /块体 |
| cast 动词 | /kæst/ | 拋 /抛, 投 |
| path 名词 | /pɑːθ/ | 路徑 /路径, 蹊徑 /蹊径 |
| notice 动词 | /ˈnoʊ.tɪs/ | 注意 |
| produce 动词 | /pɹəˈd͡ʒuːs/ | 制造, 生產 /生产 |
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 | can be observed · is moved · is produced |
| 用 “might / may” 表可能 might/may + 动词 — 有可能但不确定的事 | might have |
| “will” 表将来 will + 动词 — 决定、承诺或预测 | We'll move · will happen · will change |
需要注意的发音
- “sh” 和 “zh” 音: shadow /ˈʃædəʊ̯/, shade /ʃeɪd/, flashlight /ˈflæʃˌlaɪt/, shape /ˈʃeɪ̯p/
如何用这段视频练习
- 先完整听一遍视频，不要开口，记下不认识的单词。
- 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。
- 录下自己的声音并与原声对比，特别注意 shadow, lion, explore 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。