diff --git a/new-edition-drafts/images/vowel-positions-california.svg b/new-edition-drafts/images/vowel-positions-california.svg
new file mode 100644
index 00000000..fbbb7dea
--- /dev/null
+++ b/new-edition-drafts/images/vowel-positions-california.svg
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="1280px" height="800px" viewBox="0 0 1280 800" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>Vowels Positions Copy 2</title>
+    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="Vowels-Positions-Copy-2">
+            <rect id="Rectangle" x="0" y="0" width="1280" height="800"></rect>
+            <g id="Group" transform="translate(263, 114)" stroke="#979797" stroke-dasharray="5,10" stroke-linecap="square">
+                <line x1="0.5" y1="0.5" x2="800.5" y2="0.5" id="Line"></line>
+                <line x1="400.5" y1="569.5" x2="800.5" y2="569.5" id="Line-Copy"></line>
+                <line x1="800.5" y1="0.5" x2="800.5" y2="569.5" id="Line-4"></line>
+                <line x1="801.5" y1="192.5" x2="133.5" y2="192.5" id="Line-5"></line>
+                <line x1="801.5" y1="381.5" x2="268.5" y2="380.5" id="Line-5-Copy"></line>
+                <line x1="0.5" y1="0.5" x2="400.5" y2="569.5" id="Line-2"></line>
+                <line x1="400.5" y1="0.5" x2="600.5" y2="569.5" id="Line-3"></line>
+            </g>
+            <text id="ɛ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="581" y="539">ɛ</tspan>
+            </text>
+            <text id="ɪ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="475" y="354">ɪ</tspan>
+            </text>
+            <text id="ɑ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="969" y="670">ɑ</tspan>
+            </text>
+            <text id="o" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="1017" y="354">o</tspan>
+            </text>
+            <text id="ʊ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="816" y="235">ʊ</tspan>
+            </text>
+            <text id="i" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="322" y="160">i</tspan>
+            </text>
+            <text id="e" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="404" y="288">e</tspan>
+            </text>
+            <text id="æ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="675" y="670">æ</tspan>
+            </text>
+            <text id="ɚ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="722" y="411">ɚ</tspan>
+            </text>
+            <text id="ʌ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="803" y="551">ʌ</tspan>
+            </text>
+            <text id="u" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="838" y="185">u</tspan>
+            </text>
+            <text id="Front" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="251" y="59">Front</tspan>
+            </text>
+            <text id="Close" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="79" y="127">Close</tspan>
+            </text>
+            <text id="Open" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="79" y="692">Open</tspan>
+            </text>
+            <text id="Back" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="981.5" y="58.5">Back</tspan>
+            </text>
+        </g>
+    </g>
+</svg>
\ No newline at end of file
diff --git a/new-edition-drafts/images/vowel-positions.svg b/new-edition-drafts/images/vowel-positions.svg
new file mode 100644
index 00000000..9a03720c
--- /dev/null
+++ b/new-edition-drafts/images/vowel-positions.svg
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="1280px" height="800px" viewBox="0 0 1280 800" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>Vowels Positions Copy</title>
+    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="Vowels-Positions-Copy">
+            <rect id="Rectangle" x="0" y="0" width="1280" height="800"></rect>
+            <g id="Group" transform="translate(263, 114)" stroke="#979797" stroke-dasharray="5,10" stroke-linecap="square">
+                <line x1="0.5" y1="0.5" x2="800.5" y2="0.5" id="Line"></line>
+                <line x1="400.5" y1="569.5" x2="800.5" y2="569.5" id="Line-Copy"></line>
+                <line x1="800.5" y1="0.5" x2="800.5" y2="569.5" id="Line-4"></line>
+                <line x1="801.5" y1="192.5" x2="133.5" y2="192.5" id="Line-5"></line>
+                <line x1="801.5" y1="381.5" x2="268.5" y2="380.5" id="Line-5-Copy"></line>
+                <line x1="0.5" y1="0.5" x2="400.5" y2="569.5" id="Line-2"></line>
+                <line x1="400.5" y1="0.5" x2="600.5" y2="569.5" id="Line-3"></line>
+            </g>
+            <text id="ɪ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="251" y="127">ɪ</tspan>
+            </text>
+            <text id="e" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="386" y="315">e</tspan>
+            </text>
+            <text id="æ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="651" y="692">æ</tspan>
+            </text>
+            <text id="ə" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="753" y="410">ə</tspan>
+            </text>
+            <text id="ʌ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="1053" y="504">ʌ</tspan>
+            </text>
+            <text id="ɔ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="1053" y="695">ɔ</tspan>
+            </text>
+            <text id="u" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="1053" y="127">u</tspan>
+            </text>
+            <text id="Front" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="251" y="59">Front</tspan>
+            </text>
+            <text id="Close" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="79" y="127">Close</tspan>
+            </text>
+            <text id="Open" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="79" y="692">Open</tspan>
+            </text>
+            <text id="Back" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
+                <tspan x="981.5" y="58.5">Back</tspan>
+            </text>
+        </g>
+    </g>
+</svg>
\ No newline at end of file
diff --git a/new-edition-drafts/images/vowels-positions.svg b/new-edition-drafts/images/vowels-positions.svg
deleted file mode 100644
index 210d04bb..00000000
--- a/new-edition-drafts/images/vowels-positions.svg
+++ /dev/null
@@ -1,47 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<svg width="1280px" height="800px" viewBox="0 0 1280 800" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-    <title>Vowels Positions</title>
-    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
-        <g id="Speech-Tract-" transform="translate(-1377, -30)">
-            <g id="Vowels-Positions" transform="translate(1377, 30)">
-                <rect id="Rectangle" x="0" y="0" width="1280" height="800"></rect>
-                <g id="Group" transform="translate(263, 114)" stroke="#979797" stroke-dasharray="5,10" stroke-linecap="square">
-                    <line x1="0.5" y1="0.5" x2="800.5" y2="0.5" id="Line"></line>
-                    <line x1="400.5" y1="569.5" x2="800.5" y2="569.5" id="Line-Copy"></line>
-                    <line x1="800.5" y1="0.5" x2="800.5" y2="569.5" id="Line-4"></line>
-                    <line x1="801.5" y1="192.5" x2="133.5" y2="192.5" id="Line-5"></line>
-                    <line x1="801.5" y1="381.5" x2="268.5" y2="380.5" id="Line-5-Copy"></line>
-                    <line x1="0.5" y1="0.5" x2="400.5" y2="569.5" id="Line-2"></line>
-                    <line x1="400.5" y1="0.5" x2="600.5" y2="569.5" id="Line-3"></line>
-                </g>
-                <text id="ɪ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
-                    <tspan x="251" y="127">ɪ</tspan>
-                </text>
-                <text id="e" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
-                    <tspan x="386" y="315">e</tspan>
-                </text>
-                <text id="æ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
-                    <tspan x="651" y="692">æ</tspan>
-                </text>
-                <text id="ə" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
-                    <tspan x="753" y="410">ə</tspan>
-                </text>
-                <text id="ʌ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
-                    <tspan x="1053" y="504">ʌ</tspan>
-                </text>
-                <text id="ɔ" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
-                    <tspan x="1053" y="695">ɔ</tspan>
-                </text>
-                <text id="u" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
-                    <tspan x="1053" y="127">u</tspan>
-                </text>
-                <text id="High" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
-                    <tspan x="619" y="84">High</tspan>
-                </text>
-                <text id="Back" transform="translate(1099, 392) rotate(90) translate(-1099, -392)" font-family="CourierNewPSMT, Courier New" font-size="40" font-weight="normal" fill="#000000">
-                    <tspan x="1050.5" y="402.5">Back</tspan>
-                </text>
-            </g>
-        </g>
-    </g>
-</svg>
\ No newline at end of file
diff --git a/new-edition-drafts/英文语音简明教程.md b/new-edition-drafts/英文语音简明教程.md
index c5906c72..2dfa0761 100644
--- a/new-edition-drafts/英文语音简明教程.md
+++ b/new-edition-drafts/英文语音简明教程.md
@@ -180,11 +180,13 @@
 
 #### 2.1.1. 口腔内气流共鸣位置
 
-不同的元音在发声时，“口腔内气流共鸣位置” 不同 —— 这也是 Daniel Jones 的研究成果：
+不同的元音在发声时，“口腔内气流共鸣位置” 不同（只标注了 6 个基础元音和 `æ`）—— 这也是 Daniel Jones 的研究成果（插图参考 [Wikipedia](https://en.wikipedia.org/wiki/Vowel_diagram) 重新绘制）：
 
-![](images/vowels-positions.svg)
+![](images/vowel-positions.svg)
 
-请注意，虽然 Daniel Jones 的工作非常伟大，但最终，那只是一种 “近似描述的尝试”，而不是一个 “标准”。
+请注意，虽然 Daniel Jones 的工作非常伟大，但最终，那只是一种 “近似描述的尝试”，而不是一个 “标准”。而英文的地方口音又多，各个地方都不太一样。以下是[加利福尼亚地区的人说英语](https://en.wikipedia.org/wiki/California_English)时的元音口腔内气流共振位置：
+
+![](images/vowel-positions-california.svg)
 
 首先，每个人的发声习惯都各不相同，并非全世界所有的人都用完全相同的 “口腔内气流共鸣位置” 说出同样的元音。与此同时，人们在识别他人语音的时候，我们的大脑并不是对每个音素不同层面的各个参数进行对比分析而后才能识别，而是通过几个粗略的模式对比去完成识别，并且，还会参照一些音素之外的东西，比如，上下文。