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1000-hours/sounds-of-american-english/1.3-phonetics.md

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 The phonetic notation system employed in this tutorial is the D.J. Phonetic transcription, introduced by [Daniel Jones](https://en.wikipedia.org/wiki/Daniel_Jones_(phonetician)) who published his *English Pronouncing Dictionary* (EPD) back in 1917 and continually revised it over many years. Eventually handed over to Cambridge University Press, its name was revamped as the [*Cambridge English Pronouncing Dictionary*](https://dictionary.cambridge.org/pronunciation/english/dictionary) (CEPD). The CEPD rolled out its 15^th^ edition sometime around 1997 with an additional set of symbols for American pronunciations tallied along. Now on par with their [18^th^](https://www.cambridge.org/gb/cambridgeenglish/catalog/dictionaries/cambridge-english-pronouncing-dictionary-18th-edition) outing, this sitely respin of Jone's original framework has been widely adopted amongst major authoritative dictionaries - including but not limited to [Oxford](https://dictionary.cambridge.org/pronunciation/english/dictionary)'s upstanding series or [*Longman Dictionary of Contemporary English*](https://www.ldoceonline.com/) down till [*Collins COBUILD*](https://www.collinsdictionary.com/dictionary/english).
 
-令人遗憾的是，英文的音标并不统一，乃至于各个词典即便是采用同样名称的音标体系 —— IPA（国际音标），或者 D.J. 音标 —— 各自也有一些细微差异，比如，有的用 `əʊ` 有的用 `oʊ`，或者，有的用 `ɒ` 有的用 `ɔ`…… 
+令人遗憾的是，英文的音标并不统一，乃至于各个词典即便是采用同样名称的音标体系 —— IPA（国际音标），或者 D.J. 音标 —— 各自也有一些细微差异，比如，有的用 `əʊ` 有的用 `oʊ`，或者，有的用 `ɒ` 有的用 `ɔ`……
 
 It's unfortunate that the phonetic notation for English is inconsistent. Even dictionaries using the same system, like the International Phonetic Alphabet (IPA) or Daniel Jones' Phonetics, display slight differences. For instance, some use `əʊ` while others use `oʊ`, or some use `ɒ` yet others prefer `ɔ`... It's quite a conundrum.