diff --git a/README.md b/README.md
index d637631..0653075 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,8 @@ the interpreter a useful tool in your own projects.
 ![clang++](https://img.shields.io/badge/LLVM-clang++-262D3A?style=flat-square&logo=LLVM)
 ![vs](https://img.shields.io/badge/Visual_Studio-MSVC-5C2D91?style=flat-square&logo=visualstudio)
 
-Better download the latest update source of the interpreter and build it! It's quite easy to build this interpreter.
+Better download the latest update source of the interpreter and build it! It's quite easy to build this interpreter, what you need are only two things: C++ compiler and the `make`. There is no third-party library used in this project.
+
 __CAUTION__: If want to use the release zip/tar.gz file to build the interpreter, please read the [__Release Notes__](./doc/dev.md#release-notes) to make sure this release file has no fatal bugs.
 
 Use g++(`MinGW-w64`) or MSVC(`Visual Studio`) on `Windows` .
@@ -943,9 +944,6 @@ and the debugger will print this:
 <details><summary>Click to unfold</summary>
 
 ```javascript
-[debug] nasal debug mode
-input 'h' to get help
-
 source code:
 --> var fib=func(x)
     {
diff --git a/doc/README_zh.md b/doc/README_zh.md
index f75f3cd..5492025 100644
--- a/doc/README_zh.md
+++ b/doc/README_zh.md
@@ -53,7 +53,9 @@ __我们为什么想要重新写一个nasal解释器?__
 ![clang++](https://img.shields.io/badge/LLVM-clang++-262D3A?style=flat-square&logo=LLVM)
 ![vs](https://img.shields.io/badge/Visual_Studio-MSVC-5C2D91?style=flat-square&logo=visualstudio)
 
-我们推荐你下载最新更新的代码包来直接编译，这个项目非常小巧因此你可以非常快速地将它编译出来。
+我们推荐你下载最新更新的代码包来直接编译，这个项目非常小巧,没有使用任何第三方库，因此编译起来非常轻松，
+你只需要这两样东西: C++ 编译器以及make程序。
+
 __注意__: 如果你想直接下载发行版提供的zip/tar.gz压缩包来构建这个解释器，在下载之前请阅读[__发行日志__](../doc/dev_zh.md#发行日志)以保证这个发行版的文件中不包含非常严重的bug。
 
 `Windows` 用户通过 g++(`MinGW-w64`) 或者使用 MSVC(`Visual Studio`) 来进行编译。
@@ -904,9 +906,6 @@ local (0x7fffe0ffedf0 <sp+45>)
 <details><summary>展开</summary>
 
 ```javascript
-[debug] nasal debug mode
-input 'h' to get help
-
 source code:
 --> var fib=func(x)
     {
diff --git a/nasal_dbg.h b/nasal_dbg.h
index 242a69b..dc6e492 100644
--- a/nasal_dbg.h
+++ b/nasal_dbg.h
@@ -126,12 +126,7 @@ void debugger::stepinfo() {
 
 void debugger::interact() {
     // special operand
-    if (bytecode[pc].op==op_intg) {
-        std::cout
-        <<cyan<<"[debug] "<<reset
-        <<"nasal debug mode\n"
-        <<"input \'h\' to get help\n";
-    } else if (bytecode[pc].op==op_exit) {
+    if (bytecode[pc].op==op_exit) {
         return;
     }
     
@@ -297,7 +292,6 @@ vmexit:
     ngc.info();
     ngc.clear();
     imm.clear();
-    std::cout<<cyan<<"[debug] "<<reset<<"debugger exited\n";
     return;
 #ifndef _MSC_VER
 #define dbg(op,num) {\