Update Readme.md

Readme.md

@@ -6,25 +6,24 @@ This book was designed for easily diving into Rust，and it's very easy to use:
 
 ## Read online
 
-- [English](https://practice.rs) 
-- [Chinsese](https://zh.practice.rs) 
+- [https://practice.rs](https://practice.rs) 
 
 ## Features
+Part of our examples and exercises are borrowed from [Rust By Example](https://github.com/rust-lang/rust-by-example), thanks for your great works! 
+
+Although they are so awesome, we also has our own secret weapons :)
 
-- Read, Edit and Run the exercise ONLINE
-  
 - There are three parts in each chapter: examples, exercises and practices
-  
-- Covering nearly all aspects of Rust, such as **async/await, threads, sync primitives, optimizing and stand libraries** etc
-  
-- Solution for each exercise
-  
-- Difficulty from easy to super hard: easy 🌟  medium 🌟🌟 hard 🌟🌟🌟  super hard 🌟🌟🌟🌟
 
+- 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 stand libraries** etc
+  
+- Every exercise has its own solutions
+  
+- The difficulty is higher, distributed from easy to super hard: easy 🌟  medium 🌟🌟 hard 🌟🌟🌟  super hard 🌟🌟🌟🌟
 
-> Part of our examples and exercises are borrowed from [Rust By Example](https://github.com/rust-lang/rust-by-example), thanks for your great works! 
-> 
-> Although they are so awesome, we also has our own secret weapons :)
+**What we want to do is fill in the gap between learning and getting started with real projects.**
 
 ## Some of our exercises