跟读练习: The Production Validation Test (PVT) Phase of the NPI Process - 通过视频学习英语口语
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1
Now, PVT, the final phase.
2
Typically, how many pieces would you make, let's say a typical IoT product about this size,
3
let's say, until you actually confirm this is correct, the right quality, the right production rate,
4
we are confident that we can really just keep ramping up on this basis.
5
If we've had a successful EVT and DVT, we would shoot for a thousand units of PVT.
6
And you will not get a 99% yield rate most likely, you might have to settle with a 90% yield rate.
7
And the parts that are failing are parts then that can be used for for internal testing, they can be used for debugging,
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they can be used for problem solving.
9
But that's typically what we would shoot for to make sure that we're ready to qualify for mass production, which is the final phase.
10
Because there's always a timing constraint right?
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There's a budget constraint of course the longer you spend there the more it's costing everybody including the suppliers right?
12
Everybody just wants to go into mass production.
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Yes I mean most companies they need to be shipping products to make money to keep alive.
14
If they want to wait till they don't, if they have to have 99% off the production line before they ship then they're not getting any revenue
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and and they're not going to be able to support their efforts until probably too late.
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So what's the timeline?
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Let's say PVT is confirmed that maybe you're at 90-95% first time yield rate.
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How long does it take you if there's, let's say, continuous production typically to get to 99%?
19
It could be anything from one month to three or four months.
20
depends on the complexity of the product and how diligent the product development and NPI phase has been.
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本课的词汇与口语要点
这节 C1 级别的口语课以视频“The Production Validation Test (PVT) Phase of the NPI Process”为素材。 视频中反复出现的词有：production, product, rate, Pvt, yield。 这段视频共有 20 个句子、298 个单词可供跟读。 讲话部分时长为 2:00。 说话人语速自然，每分钟约 150 个词，接近日常对话。 88% 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。 全部 20 个句子中有 4 个是问句，适合练习疑问语调和简短回答。
视频中的重点词汇
视频中最难的 11 个单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| yield 动词 | /jiːld/ | 產量 /产量, 產生 /产生 |
| confirm 动词 | /kənˈfɝm/ | 證實 /证实, 確認 /确认 |
| solve 动词 | /sɒlv/ | 解決 /解决 |
| continuous 形容词 | /kənˈtɪn.juː.əs/ | 連續的 /连续的, 不斷的 /不断的 |
| depend 动词 | /dɪˈpɛnd/ | 信任, 信賴 /信赖 |
| timeline 名词 | /ˈtaɪmˌlaɪn/ | 年表, 時間軸 /时间轴 |
| complexity 名词 | /kəmˈplɛk.sɪ.ti/ | 複雜性 /复杂性 |
| supplier 名词 | /səˈplaɪə/ | 供應商 /供应商, 供應者 /供应者 |
| constraint 名词 | /kənˈstɹeɪnt/ | 約束 /约束 |
| debug 动词 | /diːˈbʌɡ/ | 調試 /调试, 除錯 /除错 |
| diligent 形容词 | /ˈdɪlɪdʒənt/ | 刻苦, 耐勞 /耐劳 |
需要注意的发音
说话人用了 6 次缩略和弱读形式，例如 they're, don't, we're。请按听到的简短形式来说。
- 长单词——注意重音位置: continuous /kənˈtɪn.juː.əs/, complexity /kəmˈplɛk.sɪ.ti/
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: yield /jiːld/, solve /sɒlv/, continuous /kənˈtɪn.juː.əs/, depend /dɪˈpɛnd/, constraint /kənˈstɹeɪnt/
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 yield, confirm, solve 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。