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diff --git a/1000-hours/sounds-of-american-english/2.1.8-ɔ.md b/1000-hours/sounds-of-american-english/2.1.8-ɔ.md
index a783eb36..c9b8fef4 100644
--- a/1000-hours/sounds-of-american-english/2.1.8-ɔ.md
+++ b/1000-hours/sounds-of-american-english/2.1.8-ɔ.md
@@ -1,4 +1,4 @@
-# 2.1.8. ɑː/ɔː
+# 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。
@@ -51,6 +51,25 @@ Additionally, in *stressed* syllables, ɔː might be rh
- 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**
diff --git a/1000-hours/sounds-of-american-english/2.2.16-spellings.md b/1000-hours/sounds-of-american-english/2.2.16-spellings.md
index 0475eefe..63517e24 100644
--- a/1000-hours/sounds-of-american-english/2.2.16-spellings.md
+++ b/1000-hours/sounds-of-american-english/2.2.16-spellings.md
@@ -10,7 +10,7 @@ In the previous chapters, we listed the possible spellings for each phoneme. Som
* "**ai**": `e`, `eɪ`
* "**al**": `ɑː`, `æ`, `ɔː`
* "**ar**": `ɑːr`, `ɚ`
-* "**au**": `ɑː`, `aʊ`
+* "**au**": `ɑː`, `aʊ`, `ɔː`
* "**e**": `e`, `ə`, `ɪ`, `iː`
* "**ea**": `e`, `iː`, `eɪ`
* "**ear**": `er`, `ɪr`, `ɝː`
@@ -18,7 +18,7 @@ In the previous chapters, we listed the possible spellings for each phoneme. Som
* "**ew**": `uː`, `oʊ`
* "**i**": `ɪ`, `aɪ`, `ə`, `j`,
* "**ie**": `iː`, `e`, `aɪ`
-* "**o**": `ʌ`, `ɑː`, `uː`, `oʊ`, `ə`
+* "**o**": `ʌ`, `ɑː`, `ə`, `ɔː`, `uː`, `oʊ`
* "**oo**": `ʌ`, `ʊ`, `uː`
* "**oor**": `ʊr`, `ɔːr`
* "**or**": `ɚ`, `ɝː`, `ɔːr`