diff --git a/source/03_language_reference/10_Summary_of_the_Grammar.md b/source/03_language_reference/10_Summary_of_the_Grammar.md
index c4dbe9d9..7bfc4f94 100755
--- a/source/03_language_reference/10_Summary_of_the_Grammar.md
+++ b/source/03_language_reference/10_Summary_of_the_Grammar.md
@@ -1046,7 +1046,7 @@
 >
 > *模块名* → [标识符](./02_Lexical_Structure.md#identifier)
 >
-> *环境* → **simulator**
+> *环境* → **模拟器** ｜ **macCatalyst**
 >
 
 <!-- -->