diff --git a/source/chapter3/10_Statements.md b/source/chapter3/10_Statements.md
index 7a7a052d..06946a79 100644
--- a/source/chapter3/10_Statements.md
+++ b/source/chapter3/10_Statements.md
@@ -373,3 +373,4 @@ return `表达式`
 > GRAMMAR OF A RETURN STATEMENT
 
 > *return-statement* → **return** [*expression*](https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Expressions.html#//apple_ref/swift/grammar/expression) *opt*
+