fix

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)

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 {}"

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);

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：{}"

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);