diff --git a/exercise/exercises/functions/README.md b/exercise/exercises/functions/README.md
index 66547bd4..58465d40 100644
--- a/exercise/exercises/functions/README.md
+++ b/exercise/exercises/functions/README.md
@@ -1,7 +1,7 @@
-# Functions
+# 函数（Functions）
 
-Here, you'll learn how to write functions and how Rust's compiler can trace things way back.
+在这里，你将学习如何编写函数，以及 Rust 的编译器如何对事物进行追溯（way back）。
 
-## Further information
+## 更多信息
 
 - [How Functions Work](https://doc.rust-lang.org/book/ch03-03-how-functions-work.html)
diff --git a/exercise/exercises/variables/variables3.rs b/exercise/exercises/variables/variables3.rs
index cf69ebd2..00ebcbe9 100644
--- a/exercise/exercises/variables/variables3.rs
+++ b/exercise/exercises/variables/variables3.rs
@@ -3,6 +3,7 @@
 
 // I AM NOT DONE
 
+/// 翻译: [mg-chao](https://github.com/mg-chao)
 fn main() {
     let x = 3;
     println!("Number {}", x);// 译："数字 {}"
diff --git a/exercise/exercises/variables/variables4.rs b/exercise/exercises/variables/variables4.rs
index 80339890..cdaf970d 100644
--- a/exercise/exercises/variables/variables4.rs
+++ b/exercise/exercises/variables/variables4.rs
@@ -3,6 +3,7 @@
 
 // I AM NOT DONE
 
+/// 翻译: [mg-chao](https://github.com/mg-chao)
 fn main() {
     let x: i32;
     println!("Number {}", x);
diff --git a/exercise/exercises/variables/variables5.rs b/exercise/exercises/variables/variables5.rs
index 09ecf810..87a0d628 100644
--- a/exercise/exercises/variables/variables5.rs
+++ b/exercise/exercises/variables/variables5.rs
@@ -3,6 +3,7 @@
 
 // I AM NOT DONE
 
+/// 翻译: [mg-chao](https://github.com/mg-chao)
 fn main() {
     let number = "T-H-R-E-E"; // don't change this line
     println!("Spell a Number : {}", number);// 译："拼接的数字：{}"
diff --git a/exercise/exercises/variables/variables6.rs b/exercise/exercises/variables/variables6.rs
index 2d83d656..b10eafd9 100644
--- a/exercise/exercises/variables/variables6.rs
+++ b/exercise/exercises/variables/variables6.rs
@@ -3,6 +3,7 @@
 
 // I AM NOT DONE
 
+/// 翻译: [mg-chao](https://github.com/mg-chao)
 const NUMBER = 3;
 fn main() {
     println!("Number {}", NUMBER);