跟读练习: HOW IT WORKS - Grand Piano - 通过视频学习英语口语
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36 句
如果句子过短或过长，请点击 Edit 进行调整。
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It's big, it's beautiful, it's a grand piano and each one of these majestic instruments is exquisitely handcrafted.
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The main difference from a standard upright piano is
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that in a grand the strings are longer and have to be arranged horizontally.
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The sound is produced by a felt hammer hitting up to three strings at once.
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The thicker and longer the strings are the lower the note.
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Each string begins life as a single steel wire attached to a spinning machine.
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One of the workers scuffs up the surface with sandpaper so
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when a copper wire is wrapped
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around it'll stay in
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place he adds another wire
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to the string to give it a deeper bass note the
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strings for a grand piano range in length from just five centimeters to over two meters.
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That's what allows them to produce an incredibly wide range of notes.
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Finally, he tightens the end of the wire to stop it from uncoiling.
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They have to use layers of flexible wood for the piano's casing, so they'll be able to bend it into the traditional shape.
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They're glued together and then squashed in a press until the adhesives dry.
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Then it's taken over to another press which will give it its shape.
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It's a tough job to get it into position and requires a bit of muscle and a lot of teamwork.
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When the strings are fixed, they'll have a combined tension of 24 tons, so the metal frame needs to be a super tough structure.
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It's made of precision cast iron, in a technique that was developed in the early 19th century.
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A cocktail of bronze powder, dissolver and thickener is sprayed onto the metal surface to fill any pores and give the frame a smooth finish.
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The metal frame weighs about 170 kilograms and has to be lifted into the wooden casing with a pulley.
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Then it's time to fix the strings, all 240 of them.
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Low notes have just got one string but the middle and higher notes have two or three to make them louder.
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They're called bichords and trichords.
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Each individual string has to be stressed until it reaches the exact pitch.
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Finally, they check the strings with a felt hammer.
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The hammer is controlled by a mechanism that enables a series of notes to be played consecutively at high speed.
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The workings of the piano are now complete, but before it can be fitted into the casing, an expert must check that all the hammers reach the same keystroke height,
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so they produce an even sound.
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A key has to drop under a weight of 52 grams, and they all have to be tested one by one.
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Who said the music industry was glamorous?
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All that remains is the final assembly.
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Every individual grand piano is handcrafted to the highest standards.
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That's why this factory builds, on average, just one a day.
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We'll be right back.
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本课的词汇与口语要点
这段视频共有 36 个句子、484 个单词可供跟读。 讲话部分时长为 4:42。 说话人语速较慢，每分钟约 103 个词，你有足够的时间模仿每一个音。 只有 76% 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 15 个值得学习的单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| string 名词 | /stɹɪŋ/ | 線 /线 |
| piano 名词 | /piˈænɪː/ | 鋼琴 /钢琴 |
| wire 名词 | /ˈwaɪɚ/ | 線 /线, 鐵絲 /铁丝 |
| hammer 名词 | /ˈhæmɚ/ | 摃錘仔 /𫼱锤仔, 錘子 /锤子 |
| technique 名词 | /tɛkˈniːk/ | 技術 /技术, 技巧 |
| thick 形容词 | /θɪk/ | ху, 厚 |
| muscle 名词 | /ˈmʌs.əl/ | 肌肉, 筋肉 |
| worker 名词 | /ˈwɝ.kɚ/ | 工人, 工作者 |
| layer 名词 | /ˈleɪ̯ɚ/ | 層 /层 |
| smooth 形容词 | /smuːð/ | 平穩 /平稳, 順利 /顺利 |
| spin 动词 | /spɪn/ | 轉動 /转动, 自轉 /自转 |
| wooden 形容词 | /ˈwʊdn̩/ | 木製 /木制 |
| ton 名词 | /tʌn/ | 噸 /吨, 公噸 /公吨 |
| bass 名词 | /beɪs/ | 低音 |
| copper 名词 | /ˈkɒpə/ | 銅 /铜 |
需要注意的发音
说话人用了 6 次缩略和弱读形式，例如 they'll, they're, it'll。请按听到的简短形式来说。
- “th” 音: thick /θɪk/, smooth /smuːð/
- “sh” 和 “zh” 音: tension /ˈtɛnʃən/, precision /pɹɪˈsɪʒ.ən/, squash /skwɔʃ/
- 长单词——注意重音位置: incredibly /ɪŋˈkɹɛdɪbli/, mechanism /ˈmɛk.ə.nɪ.zəm/
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 string, piano, wire 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。