diff --git a/1000-hours/sounds-of-american-english/2.4.3-cc.md b/1000-hours/sounds-of-american-english/2.4.3-cc.md
index a6919000..93506d8f 100644
--- a/1000-hours/sounds-of-american-english/2.4.3-cc.md
+++ b/1000-hours/sounds-of-american-english/2.4.3-cc.md
@@ -82,6 +82,6 @@ In addition, the ð sound can also be dropped, primaril
## 2.4.3.5 其它（others）
-值得一提的是，m/n + f/v 的情况。词汇之内我们看过 *comfort* ˈkʌmfɚt 和 *conversation* ˌkɑːnvɚˈseɪʃən 的例子。这种情况在意群之内也经常会遇到，比如，*stem from*, 只能读成 sten frəm……
+值得一提的是，m/n + f/v 的情况。词汇之内我们看过 *comfort* ˈkʌmfɚt 和 *conversation* ˌkɑːnvɚˈseɪʃən 的例子（[2.2.13](2.2.13-mnŋ)）。这种情况在意群之内也经常会遇到，比如，*stem from*, 只能读成 sten frəm……
-It's worth mentioning the situation with m/n followed by f/v. We've seen examples of this in words like *comfort* ˈkʌmfɚt and *conversation* ˌkɑːnvɚˈseɪʃən. This occurrence is often also found within a meaning group. For instance, *stem from* can only be pronounced as sten frəm.
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+It's worth mentioning the situation with m/n followed by f/v. We've seen examples of this in words like *comfort* ˈkʌmfɚt and *conversation* ˌkɑːnvɚˈseɪʃən([2.2.13](2.2.13-mnŋ)). This occurrence is often also found within a meaning group. For instance, *stem from* can only be pronounced as sten frəm.