keep updated

1000-hours/.vitepress/config.mts

@@ -111,7 +111,6 @@ export default withMermaid(
               },
               {
                 text: "2. 发声器官",
-                collapsed: true,
                 link: "/sounds-of-american-english/2-articulators",
               },
               {
@@ -121,6 +120,7 @@ export default withMermaid(
                 items: [
                   {
                     text: "3.1. 元音",
+                    collapsed: true,
                     link: "/sounds-of-american-english/3.1-vowels",
                     items: [
                       {
@@ -159,6 +159,7 @@ export default withMermaid(
                   },
                   {
                     text: "3.2. 辅音",
+                    collapsed: true,
                     link: "/sounds-of-american-english/3.2-consonants",
                     items: [
                       {
@@ -225,6 +226,7 @@ export default withMermaid(
                   },
                   {
                     text: "3.3. 音节",
+                    collapsed: true,
                     link: "/sounds-of-american-english/3.3-syllables",
                     items: [
                       {
@@ -239,6 +241,7 @@ export default withMermaid(
                   },
                   {
                     text: "3.4. 连接",
+                    collapsed: true,
                     link: "/sounds-of-american-english/3.4-linking",
                     items: [
                       {
@@ -259,6 +262,33 @@ export default withMermaid(
                       },
                     ]
                   },
+                  {
+                    text: "3.5. 韵律",
+                    collapsed: true,
+                    link: "/sounds-of-american-english/3.5-prosody",
+                    items: [
+                      {
+                        text: "3.5.1. 高低",
+                        link: "/sounds-of-american-english/3.5.1-pitch",
+                      },                      
+                      {
+                        text: "3.5.2. 起伏",
+                        link: "/sounds-of-american-english/3.5.2-intonation",
+                      },
+                      {
+                        text: "3.5.3. 轻重",
+                        link: "/sounds-of-american-english/3.5.3-weight",
+                      },
+                      {
+                        text: "3.5.4. 缓急",
+                        link: "/sounds-of-american-english/3.5.4-speed",
+                      },
+                      {
+                        text: "3.5.5. 长短",
+                        link: "/sounds-of-american-english/3.5.5-length",
+                      },
+                    ]
+                  },
                 ],
               },
             ],

1000-hours/sounds-of-american-english/3.2.13-mnŋ.md

@@ -12,9 +12,11 @@ Similarly, everyone finds it easy to pronounce `ŋ` after other vowels. This isn
 
 The tricky part comes when `m` is at the end of a syllable. A lot of people have an involuntary habit of adding an extra `ʊ` sound, which results from an unnecessary lips' movement. For instance, they might pronounce *room* as `/ruːmʊ/`, instead of `/ruːm/`.
 
-另外，`m/n` 处于 `f/v` 之前的时候，发音都会发生变化 —— 这是因为 `f/v` 的发声动作，需要上牙与下唇接触。
+当 `m/n` 处于 `f/v` 之前的时候，发音都会发生变化 —— 这是因为 `f/v` 的发声动作，需要上牙与下唇接触。
 
-Additionally, when `m/n` precedes `f/v`, their pronunciation changes - this is because the vocalization of `f/v` requires the upper teeth to touch the lower lip.
+When `m/n` precedes `f/v`, their pronunciation changes - this is because the vocalization of `f/v` requires the upper teeth to touch the lower lip.
 
 > * `m + f/v` = `n + f/v`, *comfort* `/ˈkəmfərt/` → `/ˈkənfərt/`
 > * `n + f/v` = `ŋ + f/v`, *conversation* `/ˌkɑnvərˈseɪʃən/` → `/ˌkɑŋvərˈseɪʃən/`
+
+另外，当 `æ` 在 `m` 之前的时候，部分母语使用者会添一个 `ə` 进去，比如，Sam `/sæm/`，会被他们读成 `/sæəm/`。