跟读练习: How Big Is The Biggest Black Hole? - 通过视频学习英语口语
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17 句
如果句子过短或过长，请点击 Edit 进行调整。
1
The size of black holes is insane.
2
One of the smallest known black holes is J1650.
3
Its diameter is about as long as Manhattan, but it's got a mass of 3 .8 of our suns.
4
Step up is this black hole, Messier 15.
5
It's about the size of Mars, with a mass of 4 ,000 suns.
6
Now we're getting to the lower limit of what's considered a supermassive black hole.
7
This one's about the same size as our sun, but 100 ,000 times its mass.
8
And get this, the black hole at the center of our galaxy, Sagittarius A, is about this size compared to the sun to our sun and has 4 million times its mass.
9
We captured this image of it in 2022.
10
Now comes the truly insane.
11
The black hole in galaxy M87 weighs 5 .4 billion suns.
12
It was the first to be imaged in 2019.
13
And then one of the largest black holes ever discovered weighs a whopping 66 billion times more than our sun.
14
And finally there's Phoenix A star, estimated to have a mass of a hundred billion suns.
15
We haven't measured it directly, and ton 618 is farther away than Phoenix A *.
16
So we're seeing it farther back in time.
17
We made a whole longer video all about black holes, so subscribe.
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本课的词汇与口语要点
这节 B2 级别的口语课以视频“How Big Is The Biggest Black Hole?”为素材。 视频中反复出现的词有：hole, sun, mass, size, billion。 这段视频共有 17 个句子、206 个单词可供跟读。 讲话部分时长为 1:10。 说话人语速自然，每分钟约 176 个词，接近日常对话。 只有 79% 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 10 个单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| insane 形容词 | /ɪnˈseɪn/ | 精神失常, 精神錯亂 /精神错乱 |
| galaxy 名词 | /ˈɡæl.ək.si/ | 恆星系 /恒星系, 群星 |
| weigh 动词 | /weɪ/ | 稱重 /称重 |
| compare 动词 | /kəmˈpɛɚ/ | 比, 比較 /比较 |
| capture 动词 | /ˈkæp.(t)ʃɚ/ | 捕獲 /捕获, 佔領 /占领 |
| discover 动词 | /dɪˈskʌvə/ | 發現 /发现, 發覺 /发觉 |
| estimate 名词 | /ˈɛs.tɪ.mət/ | 估計 /估计 |
| diameter 名词 | /daɪˈæmɪdɚ/ | 直徑 /直径 |
| subscribe 动词 | /səbˈskɹaɪb/ | 簽署 /签署 |
| hole 名词 | /hoʊl/ | 孔, 洞 |
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 |
|---|---|
| 现在完成时 have/has + 过去分词 — 过去发生但与现在仍有关联的事 | haven't measured |
| 被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的 | be imaged |
需要注意的发音
说话人用了 3 次缩略和弱读形式，例如 we're, haven't。请按听到的简短形式来说。
- “sh” 和 “zh” 音: capture /ˈkæp.(t)ʃɚ/, measure /ˈmeɪ.ʒɚ/
中文母语者容易读错的音：
- 词尾辅音 — 要读清楚，后面不要加元音: estimate /ˈɛs.tɪ.mət/, subscribe /səbˈskɹaɪb/
- /æ/ — 嘴张大，不要读成 /e/: galaxy /ˈɡæl.ək.si/, capture /ˈkæp.(t)ʃɚ/, diameter /daɪˈæmɪdɚ/
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。
- 先用 0.75 倍速逐句跟读，熟练之后再回到正常速度。
- 录下自己的声音并与原声对比，特别注意 insane, galaxy, weigh 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。