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everyone-can-use-english/1000-hours/sounds-of-american-english/3.3-variations.md
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# 3.3. 变体
虽然几乎每个权威词典都声称自己采用的是 “国际音标”IPA可实际上每个词典的音标标注都各不相同都是国际音标的一个**自定义子集**。
事实上,音标本身就是个**不完美**的标注系统,无论是英文的音标,还是中文的拼音(或者注音),抑或是其他语言的类似系统,都只是 “尽了全力却终究在一些细节上无法做好” 的那么一种存在 —— 哪怕是历经多年增补修改的国际音标。
幸亏,各种词典的音标不同主要体现在元音上 —— 辅音的标注大抵上都是一样的 —— 所以,掌握了某一个音标体系之后,稍微再挣扎一下,就可以看懂各种词典的音标。
| 元音音标 | 例词 | 剑桥 | 牛津 | 朗文 | 韦氏 | 柯林斯 |
| ----------------------------- | -------- | -------------------------------- | --------------------------------- | --------------------------------- | --------------------------------- | -------------------------------- |
| <span class="pho">ʌ</span> | *but* | <span class="pho">bʌt</span> | <span class="pho">bət</span> | <span class="pho">bʌt</span> | <span class="pho">bət</span> | <span class="pho">bʌt</span> |
| <span class="pho">ɚ</span> | *father* | <span class="pho">ˈfɑː.ðɚ</span> | <span class="pho">ˈfɑðər</span> | <span class="pho">ˈfɑːðər</span> | <span class="pho">ˈfä-thər</span> | <span class="pho">fɑːðəʳ</span> |
| <span class="pho">ɝː</span> | *worker* | <span class="pho">ˈː.kɚ</span> | <span class="pho">ˈːrkər</span> | <span class="pho">ˈːrkər</span> | <span class="pho">ˈwər-kər</span> | <span class="pho">wɜːʳkəʳ</span> |
| <span class="pho">ɒ/ɑː</span> | *dog* | <span class="pho">dɑːɡ</span> | <span class="pho">dɔɡ</span> | <span class="pho">dɒːɡ</span> | <span class="pho">ˈdäg</span> | <span class="pho">dɔːg</span> |
| <span class="pho">e</span> | *bed* | <span class="pho">bed</span> | <span class="pho">bɛd</span> | <span class="pho">bed</span> | <span class="pho">bed</span> | <span class="pho">bed</span> |
| <span class="pho">er</span> | *air* | <span class="pho">er</span> | <span class="pho">ɛr</span> | <span class="pho">er</span> | <span class="pho">er</span> | <span class="pho">eəʳ</span> |
| <span class="pho">ɪr</span> | *ear* | <span class="pho">ɪr</span> | <span class="pho">ɪr</span> | <span class="pho">ɪr</span> | <span class="pho">ir</span> | <span class="pho">ɪəʳ</span> |
| <span class="pho">ʊr</span> | *pure* | <span class="pho">pjʊr</span> | <span class="pho">pjʊr</span> | <span class="pho">pjʊr</span> | <span class="pho">ˈpyu̇r</span> | <span class="pho">pjʊəʳ</span> |
| <span class="pho">oʊ</span> | *nose* | <span class="pho">noʊz</span> | <span class="pho">noʊz</span> | <span class="pho">noʊz</span> | <span class="pho">ˈnōz</span> | <span class="pho">noʊz</span> |
稍加整理,就会发现,各个词典中最常不同的,变体最多的,其实只有 <span class="pho">ə</span>
* 短元音版本 <span class="pho">ə</span>[^1],在某些词典中,可以用来表示 <span class="pho">ʌ</span> —— 比如,牛津词典或韦氏词典里的 *but* <span class="pho alt">bət</span>
* 短元音儿化音版本 <span class="pho">ɚ</span>, 可能被写作 <span class="pho">ər</span> 或者 <span class="pho">əʳ</span>;进而,在柯林斯词典里,<span class="pho">ɪr</span> 被写作 <span class="pho">ɪəʳ</span><span class="pho">er</span> 被写作 <span class="pho">eəʳ</span>, <span class="pho">ʊr</span> 被写作 <span class="pho">ʊəʳ</span>……
* 长元音 <span class="pho">ɝː</span>,可能被写作 <span class="pho">əːr</span><span class="pho">ɜːr</span>,或者 <span class="pho">ɜːʳ</span>。
另外,<span class="pho">e</span> 有可能被写成 <span class="pho">ɛ</span>,比如牛津词典。
而 <span class="pho">ɒ/ɑː</span> 最混乱,各有各的写法。比如 *dog*
| 元音音标 | 例词 | 剑桥 | 牛津 | 朗文 | 韦氏 | 柯林斯 |
| ----------------------------- | ----- | ----------------------------- | ---------------------------- | ----------------------------- | ----------------------------- | ----------------------------- |
| <span class="pho">ɒ/ɑː</span> | *dog* | <span class="pho">dɑːɡ</span> | <span class="pho">dɔɡ</span> | <span class="pho">dɒːɡ</span> | <span class="pho">ˈdäg</span> | <span class="pho">dɔːg</span> |
韦氏词典的音标相对最特殊,可能需要专门适应[^2]。比如,双元音使用上横标表示:
| 剑桥 | <span class="pho">aɪ</span> | <span class="pho">eɪ</span> | <span class="pho">oʊ</span> |
| ---- | --- | --- | --- |
| 韦氏 | <span class="pho">ɪ̅</span> | <span class="pho">a̅</span> | <span class="pho">o̅</span> |
韦氏词典的辅音也相对比较独特。比如,它用 <span class="pho">th</span> 标注 <span class="pho">θ</span> ,用带下划线的 <u><span class="pho">th</span></u> 标注 <span class="pho">ð</span>…… 初学者可以完全不必理会韦氏词典的音标。
其实,快速掌握音标的最简单直接有效的方法就是**勤查词典** —— 看的次数越多,看的密度越高,就自然而然地熟悉了…… 不过,在一段时间里,最好只查一个特定的词典。
另外,在附录 [8.2. 获取 CEPD 音标](8.2-cepd-phonetics-and-sound)中,我介绍了一种可以在 macOS 上快速查询并获得《剑桥英语发声词典》中的音标和发音的方法。
事实上,我们还会遇到很多其它的变体。比如,在 Enjoy App 中,在底层对音频文件进行语音识别的引擎,用的是 espeak[它就有一套自己的音标体系](https://github.com/espeak-ng/espeak-ng/blob/master/docs/phonemes.md);而语音评估采用的引擎是微软的 Azure[它也有自己的一套音标体系](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-ssml-phonetic-sets#section)…… 而真正的解决方案其实是 “**态度上的选择**” —— **不怕麻烦**。说实话,除此之外,根本就没有其它的决方案。
[^1]: 比较罕见的情况下,短元音 <span class="pho">ə</span> 会被写作 <span class="pho">ɜ</span>。
[^2]: https://merriam-webster.com/assets/mw/static/pdf/help/guide-to-pronunciation.pdf