diff --git a/Readme.md b/Readme.md
index 25514e5..98995a3 100644
--- a/Readme.md
+++ b/Readme.md
@@ -18,7 +18,7 @@ Although they are so awesome, we have our own secret weapons :)
 
 - Besides examples, we have `a lot of exercises`, you can Read, Edit and Run them ONLINE
 
-- Covering nearly all aspects of Rust, such as async/await, threads, sync primitives, optimizing and standard libraries** etc.
+- Covering nearly all aspects of Rust, such as async/await, threads, sync primitives, optimizing and standard libraries etc.
 
 - Every exercise has its own solutions
 
diff --git a/zh-CN/src/basic-types/numbers.md b/zh-CN/src/basic-types/numbers.md
index 6ef4fa9..03e315b 100644
--- a/zh-CN/src/basic-types/numbers.md
+++ b/zh-CN/src/basic-types/numbers.md
@@ -40,7 +40,7 @@ fn main() {
     assert_eq!("u32".to_string(), type_of(&x));
 }
 
-// 以下还输可以获取传入参数的类型，并返回类型的字符串形式，例如  "i8", "u8", "i32", "u32"
+// 以下函数可以获取传入参数的类型，并返回类型的字符串形式，例如  "i8", "u8", "i32", "u32"
 fn type_of<T>(_: &T) -> String {
     format!("{}", std::any::type_name::<T>())
 }
@@ -142,6 +142,7 @@ fn main() {
     // 整数减法
     assert!(1i32 - 2 == __);
     assert!(1u8 - 2 == -1);
+    
     assert!(3 * 50 == __);
 
     assert!(9.6 / 3.2 == 3.0); // error ! 修改它让代码工作
@@ -162,4 +163,4 @@ fn main() {
 }
 ```
 
-> 你可以在[这里](https://github.com/sunface/rust-by-practice)找到答案(在 solutions 路径下) 
\ No newline at end of file
+> 你可以在[这里](https://github.com/sunface/rust-by-practice)找到答案(在 solutions 路径下) 
diff --git a/zh-CN/src/ownership/borrowing.md b/zh-CN/src/ownership/borrowing.md
index 2af1dd9..aee9771 100644
--- a/zh-CN/src/ownership/borrowing.md
+++ b/zh-CN/src/ownership/borrowing.md
@@ -108,7 +108,7 @@ fn main() {
 ```
 
 #### 可变性
-8. 🌟 错误: 从可不用对象借用可用
+8. 🌟 错误: 从不可变对象借用可变
 ```rust,editable
 
 fn main() {
@@ -167,4 +167,4 @@ fn main() {
 }
 ```
 
-> 你可以在[这里](https://github.com/sunface/rust-by-practice)找到答案(在 solutions 路径下) 
\ No newline at end of file
+> 你可以在[这里](https://github.com/sunface/rust-by-practice)找到答案(在 solutions 路径下)