# 2.1.8. ɑː/ɔː/ɔːr
这一对元音在发声的时候，嘴唇动作非常明显，要在嘴唇形成一个小的圆形之后才开始发音。
When pronouncing this pair of vowels, the lip movement is very noticeable. It's important to form a small circle with lips before beginning to vocalize.
在 CEPD 里，美音 ɑː 实际上对应的是英音里的短元音 ɒ。在美音里，ɑː 可以被理解为是个半长元音。
In the Cambridge English Pronouncing Dictionary (CEPD), the American English vowel sound ɑː actually corresponds with the short vowel sound ɒ in British English. In American English, ɑː can be thought of as a *semi-long* vowel.
与英音的 ɒ 相比，美音的 ɑː 会嘴巴张得更大一点，读得更长一点，听起来更像 ɑ，但口型略圆。比如，*dog*, 英音是 dɒg, 美音却是 dɑːg；而 *God*, 英音是 gɒd，美音同样相对更长一点，gɑːd。
Compared to the British ɒ, the American ɑː is pronounced with a slightly more open mouth, held a bit longer, and sounds more like ɑ. However, the shape of the mouth is slightly rounded. For instance, for the word *dog*, in British English, it's pronounced as dɒg, while in American English, it's pronounced as dɑːg. Similarly, for *God*, it's gɒd in British English, but in American English it's elongated to gɑːd.
但是，长元音 ɔː 在美式英语里，也许口型张得相对更大一些，但，并没有 ɑ 的音色。比如，*ordinary* ˈɔːrdəneri 或者 inventory ˈɪnvəntɔːri。
However, the long vowel sound ɔː in American English might require a slightly wider mouth opening, but it doesn't have the flavor of ɑ sound. For example, *ordinary* ˈɔːrdəneri or *inventory* ˈɪnvəntɔːri.
另外，在重读音节里，ɔː 可能会被美国人儿化，读成 ɔːr ，更像是双元音 ɔər。比如，*more* mɔːr。
Additionally, in *stressed* syllables, ɔː might be rhotacized by Americans to sound like ɔːr, resembling the diphthong ɔər, for example, *more* mɔːr.
## 拼写（Spellings）
### ɑː (equivalent to British ɒ)
* **a**
* father ˈfɑː.ðɚ
* watch wɑːtʃ
* wasp wɑːsp
* **al**
* almond ˈɑːl.mənd
* balm bɑːm
* palm pɑːm
* **au**
* because bɪˈkɑːz
* clause klɑːz
* paunch pɑːntʃ
* **aw**
* drawn drɑːn
* awning ˈɑː.nɪŋ
* law lɑː
* **o**
* hot hɑːt
* dog dɑːɡ
* log lɑːɡ
* **ough**
* bought bɑːt
* thought θɑːt
* fought fɑːt
### ɔː
* **al**
* palsy ˈpɔːl.zi
* saltine sɔːlˈtiːn
* wall wɑːl
* **au**
* aurora ɔːˈrɔːr.ə
* caudal ˈkɔː.dəl
* saute sɔːˈteɪ
* **aw**
* draw drɔː
* saw sɔː
* **o**
* boring ˈbɔː.rɪŋ
* orange ˈɔːr.ɪndʒ
* inventory ˈɪn.vən.tɔːr.i
### ɔːr
* **or**
* fork fɔːrk
* horse hɔːrs
* short ʃɔːrt
* **oar**
* board bɔːrd
* soar sɔːr
* roar rɔːr
* **our**
* four fɔːr
* pour pɔːr
* **ore**
* core kɔːr
* more mɔːr
* shore ʃɔːr
* **oor**
* door dɔːr
* floor flɔːr