diff --git a/exercises/03_if/README.md b/exercises/03_if/README.md
index b52c3922..b99e76ce 100644
--- a/exercises/03_if/README.md
+++ b/exercises/03_if/README.md
@@ -1,7 +1,7 @@
 # If
 
-`if`, the most basic (but still surprisingly versatile!) type of control flow, is what you'll learn here.
+`if` 是最基本（但仍然非常多用途！）的控制流類型，您將在這裡學習它。
 
-## Further information
+## 更多資訊
 
-- [Control Flow - if expressions](https://doc.rust-lang.org/book/ch03-05-control-flow.html#if-expressions)
+- [控制流 - if 表達式](https://doc.rust-lang.org/book/ch03-05-control-flow.html#if-expressions)
diff --git a/exercises/03_if/if1.rs b/exercises/03_if/if1.rs
index d2afccf8..4bde5f05 100644
--- a/exercises/03_if/if1.rs
+++ b/exercises/03_if/if1.rs
@@ -1,18 +1,18 @@
 // if1.rs
 //
-// Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint.
+// 執行 `rustlings hint if1` 或使用 `hint` watch 子命令來獲取提示。
 
 // I AM NOT DONE
 
 pub fn bigger(a: i32, b: i32) -> i32 {
-    // Complete this function to return the bigger number!
-    // If both numbers are equal, any of them can be returned.
-    // Do not use:
-    // - another function call
-    // - additional variables
+    // 完成此函數以返回較大的數字！
+    // 如果兩個數字相等，可以返回任意一個。
+    // 不要使用：
+    // - 其他函數調用
+    // - 其他變數
 }
 
-// Don't mind this for now :)
+// 暫時不用管這個 :)
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/exercises/03_if/if2.rs b/exercises/03_if/if2.rs
index f512f13f..6b4e9324 100644
--- a/exercises/03_if/if2.rs
+++ b/exercises/03_if/if2.rs
@@ -1,9 +1,9 @@
 // if2.rs
 //
-// Step 1: Make me compile!
-// Step 2: Get the bar_for_fuzz and default_to_baz tests passing!
+// 第一步：讓我編譯通過！
+// 第二步：讓 bar_for_fuzz 和 default_to_baz 測試通過！
 //
-// Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint.
+// 執行 `rustlings hint if2` 或使用 `hint` watch 子命令來獲取提示。
 
 // I AM NOT DONE
 
@@ -15,7 +15,7 @@ pub fn foo_if_fizz(fizzish: &str) -> &str {
     }
 }
 
-// No test changes needed!
+// 不需要更改測試！
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/exercises/03_if/if3.rs b/exercises/03_if/if3.rs
index 16962740..92677210 100644
--- a/exercises/03_if/if3.rs
+++ b/exercises/03_if/if3.rs
@@ -1,56 +1,56 @@
 // if3.rs
 //
-// Execute `rustlings hint if3` or use the `hint` watch subcommand for a hint.
+// 執行 `rustlings hint if3` 或使用 `hint` watch 子命令來獲取提示。
 
 // I AM NOT DONE
 
 pub fn animal_habitat(animal: &str) -> &'static str {
-    let identifier = if animal == "crab" {
+    let identifier = if animal == "螃蟹" {
         1
-    } else if animal == "gopher" {
+    } else if animal == "地鼠" {
         2.0
-    } else if animal == "snake" {
+    } else if animal == "蛇" {
         3
     } else {
-        "Unknown"
+        "未知"
     };
 
-    // DO NOT CHANGE THIS STATEMENT BELOW
+    // 請勿更改下面的這條語句
     let habitat = if identifier == 1 {
-        "Beach"
+        "海灘"
     } else if identifier == 2 {
-        "Burrow"
+        "地洞"
     } else if identifier == 3 {
-        "Desert"
+        "沙漠"
     } else {
-        "Unknown"
+        "未知"
     };
 
     habitat
 }
 
-// No test changes needed.
+// 不需要更改測試。
 #[cfg(test)]
 mod tests {
     use super::*;
 
     #[test]
     fn gopher_lives_in_burrow() {
-        assert_eq!(animal_habitat("gopher"), "Burrow")
+        assert_eq!(animal_habitat("地鼠"), "地洞")
     }
 
     #[test]
     fn snake_lives_in_desert() {
-        assert_eq!(animal_habitat("snake"), "Desert")
+        assert_eq!(animal_habitat("蛇"), "沙漠")
     }
 
     #[test]
     fn crab_lives_on_beach() {
-        assert_eq!(animal_habitat("crab"), "Beach")
+        assert_eq!(animal_habitat("螃蟹"), "海灘")
     }
 
     #[test]
     fn unknown_animal() {
-        assert_eq!(animal_habitat("dinosaur"), "Unknown")
+        assert_eq!(animal_habitat("恐龍"), "未知")
     }
 }
diff --git a/exercises/04_primitive_types/README.md b/exercises/04_primitive_types/README.md
index cea69b02..cd51a84b 100644
--- a/exercises/04_primitive_types/README.md
+++ b/exercises/04_primitive_types/README.md
@@ -1,9 +1,8 @@
-# Primitive Types
+# 原始類型
 
-Rust has a couple of basic types that are directly implemented into the
-compiler. In this section, we'll go through the most important ones.
+Rust 有幾種基本類型是直接由編譯器實現的。在這一部分，我們將介紹最重要的那些。
 
-## Further information
+## 更多資訊
 
-- [Data Types](https://doc.rust-lang.org/stable/book/ch03-02-data-types.html)
-- [The Slice Type](https://doc.rust-lang.org/stable/book/ch04-03-slices.html)
+- [資料型態](https://doc.rust-lang.org/stable/book/ch03-02-data-types.html)
+- [切片類型](https://doc.rust-lang.org/stable/book/ch04-03-slices.html)
diff --git a/exercises/04_primitive_types/primitive_types1.rs b/exercises/04_primitive_types/primitive_types1.rs
index 36633400..775d9ece 100644
--- a/exercises/04_primitive_types/primitive_types1.rs
+++ b/exercises/04_primitive_types/primitive_types1.rs
@@ -1,20 +1,19 @@
 // primitive_types1.rs
 //
-// Fill in the rest of the line that has code missing! No hints, there's no
-// tricks, just get used to typing these :)
+// 填寫剩下缺少代碼的行！沒有提示，沒有技巧，只是讓您習慣打字 :)
 
 // I AM NOT DONE
 
 fn main() {
-    // Booleans (`bool`)
+    // 布林值 (`bool`)
 
     let is_morning = true;
     if is_morning {
-        println!("Good morning!");
+        println!("早安！");
     }
 
-    let // Finish the rest of this line like the example! Or make it be false!
+    let is_evening = false; // 像例子一樣完成這行！或者讓它變成 false！
     if is_evening {
-        println!("Good evening!");
+        println!("晚安！");
     }
 }
diff --git a/exercises/04_primitive_types/primitive_types2.rs b/exercises/04_primitive_types/primitive_types2.rs
index f1616ed3..e7e5388d 100644
--- a/exercises/04_primitive_types/primitive_types2.rs
+++ b/exercises/04_primitive_types/primitive_types2.rs
@@ -1,32 +1,28 @@
 // primitive_types2.rs
 //
-// Fill in the rest of the line that has code missing! No hints, there's no
-// tricks, just get used to typing these :)
+// 填寫剩下缺少代碼的行！沒有提示，沒有技巧，只是讓您習慣打字 :)
 
 // I AM NOT DONE
 
 fn main() {
-    // Characters (`char`)
+    // 字符 (`char`)
 
-    // Note the _single_ quotes, these are different from the double quotes
-    // you've been seeing around.
+    // 注意是 _單引號_，這與您經常看到的雙引號不同。
     let my_first_initial = 'C';
     if my_first_initial.is_alphabetic() {
-        println!("Alphabetical!");
+        println!("字母！");
     } else if my_first_initial.is_numeric() {
-        println!("Numerical!");
+        println!("數字！");
     } else {
-        println!("Neither alphabetic nor numeric!");
+        println!("既不是字母也不是數字！");
     }
 
-    let // Finish this line like the example! What's your favorite character?
-    // Try a letter, try a number, try a special character, try a character
-    // from a different language than your own, try an emoji!
+    let // 像例子一樣完成這行！您最喜歡的字符是什麼？試試字母、數字、特殊字符，或者不同語言的字符，甚至是表情符號！
     if your_character.is_alphabetic() {
-        println!("Alphabetical!");
+        println!("字母！");
     } else if your_character.is_numeric() {
-        println!("Numerical!");
+        println!("數字！");
     } else {
-        println!("Neither alphabetic nor numeric!");
+        println!("既不是字母也不是數字！");
     }
 }
diff --git a/exercises/04_primitive_types/primitive_types3.rs b/exercises/04_primitive_types/primitive_types3.rs
index 8b0de44e..57a72716 100644
--- a/exercises/04_primitive_types/primitive_types3.rs
+++ b/exercises/04_primitive_types/primitive_types3.rs
@@ -1,9 +1,8 @@
 // primitive_types3.rs
 //
-// Create an array with at least 100 elements in it where the ??? is.
+// 創建一個包含至少 100 個元素的陣列，並填寫 ??? 處的代碼。
 //
-// Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand
-// for a hint.
+// 執行 `rustlings hint primitive_types3` 或使用 `hint` watch 子命令來獲取提示。
 
 // I AM NOT DONE
 
@@ -11,9 +10,9 @@ fn main() {
     let a = ???
 
     if a.len() >= 100 {
-        println!("Wow, that's a big array!");
+        println!("哇，那是一個大陣列！");
     } else {
-        println!("Meh, I eat arrays like that for breakfast.");
-        panic!("Array not big enough, more elements needed")
+        println!("嗯，我早餐吃的就是這樣的陣列。");
+        panic!("陣列不夠大，需要更多元素")
     }
 }
diff --git a/exercises/04_primitive_types/primitive_types4.rs b/exercises/04_primitive_types/primitive_types4.rs
index d44d8776..a676980e 100644
--- a/exercises/04_primitive_types/primitive_types4.rs
+++ b/exercises/04_primitive_types/primitive_types4.rs
@@ -1,9 +1,8 @@
 // primitive_types4.rs
 //
-// Get a slice out of Array a where the ??? is so that the test passes.
+// 從陣列 a 中獲取一個切片，填寫 ??? 處的代碼，使測試通過。
 //
-// Execute `rustlings hint primitive_types4` or use the `hint` watch subcommand
-// for a hint.
+// 執行 `rustlings hint primitive_types4` 或使用 `hint` watch 子命令來獲取提示。
 
 // I AM NOT DONE
 
diff --git a/exercises/04_primitive_types/primitive_types5.rs b/exercises/04_primitive_types/primitive_types5.rs
index f646986e..0f3c6d60 100644
--- a/exercises/04_primitive_types/primitive_types5.rs
+++ b/exercises/04_primitive_types/primitive_types5.rs
@@ -1,15 +1,14 @@
 // primitive_types5.rs
 //
-// Destructure the `cat` tuple so that the println will work.
+// 解構 `cat` 元組，使 println 可以正常工作。
 //
-// Execute `rustlings hint primitive_types5` or use the `hint` watch subcommand
-// for a hint.
+// 執行 `rustlings hint primitive_types5` 或使用 `hint` watch 子命令來獲取提示。
 
 // I AM NOT DONE
 
 fn main() {
     let cat = ("Furry McFurson", 3.5);
-    let /* your pattern here */ = cat;
+    let /* 在此填寫解構模式 */ = cat;
 
     println!("{} is {} years old.", name, age);
 }
diff --git a/exercises/04_primitive_types/primitive_types6.rs b/exercises/04_primitive_types/primitive_types6.rs
index 07cc46c6..3c829552 100644
--- a/exercises/04_primitive_types/primitive_types6.rs
+++ b/exercises/04_primitive_types/primitive_types6.rs
@@ -1,19 +1,17 @@
 // primitive_types6.rs
 //
-// Use a tuple index to access the second element of `numbers`. You can put the
-// expression for the second element where ??? is so that the test passes.
+// 使用元組索引來訪問 `numbers` 的第二個元素。您可以將表達式替換到 ??? 處，使測試通過。
 //
-// Execute `rustlings hint primitive_types6` or use the `hint` watch subcommand
-// for a hint.
+// 執行 `rustlings hint primitive_types6` 或使用 `hint` watch 子命令來獲取提示。
 
 // I AM NOT DONE
 
 #[test]
 fn indexing_tuple() {
     let numbers = (1, 2, 3);
-    // Replace below ??? with the tuple indexing syntax.
+    // 使用元組索引語法替換下面的 ???。
     let second = ???;
 
     assert_eq!(2, second,
-        "This is not the 2nd number in the tuple!")
+        "這不是元組中的第二個數字！")
 }