diff --git a/cmd/verysimple/cmd.go b/cmd/verysimple/cmd.go
index 8ad3590..7ff5218 100644
--- a/cmd/verysimple/cmd.go
+++ b/cmd/verysimple/cmd.go
@@ -23,7 +23,7 @@ import (
 var (
 	download bool
 
-	extra_preCommands []func()
+	preCommands []func()
 
 	exitCmds = []exitCmd{
 		{name: "sp", desc: "print supported protocols", f: printSupportedProtocols},
@@ -81,16 +81,17 @@ func runExitCommands() (atLeastOneCalled bool) {
 	return
 }
 
+// 运行 一些 在 加载配置文件前 执行的 命令
 func runPreCommands() {
-	if len(extra_preCommands) > 0 {
-		for _, f := range extra_preCommands {
+	if len(preCommands) > 0 {
+		for _, f := range preCommands {
 			f()
 		}
 	}
 
 }
 
-// 在开始正式代理前, 先运行一些需要运行的命令与函数
+// 运行一些 在 加载配置文件后 、开始正式代理前 执行的 命令
 func runPreCommandsAfterLoadConf() {
 
 	if download {
diff --git a/cmd/verysimple/main.go b/cmd/verysimple/main.go
index 9265d16..3bc74f9 100644
--- a/cmd/verysimple/main.go
+++ b/cmd/verysimple/main.go
@@ -342,6 +342,7 @@ func exitBySignal() {
 	stopMachineAndExit(mainM)
 }
 
+// splice, pprof, urlFormat, dialtimeout
 func setupSystemParemeters() {
 	if disableSplice {
 		netLayer.SystemCanSplice = false
diff --git a/cmd/verysimple/tun.go b/cmd/verysimple/tun.go
index 8f08b13..d5cafc5 100644
--- a/cmd/verysimple/tun.go
+++ b/cmd/verysimple/tun.go
@@ -14,7 +14,7 @@ import (
 )
 
 func init() {
-	extra_preCommands = append(extra_preCommands, func() {
+	preCommands = append(preCommands, func() {
 		if download {
 			if runtime.GOOS == "windows" {
 				//自动下载wintun.dll
diff --git a/machine/apiServer.go b/machine/apiServer.go
index 1b350c2..9fe98a7 100644
--- a/machine/apiServer.go
+++ b/machine/apiServer.go
@@ -18,6 +18,8 @@ import (
 	"go.uber.org/zap"
 )
 
+const eIllegalParameter = "illegal parameter"
+
 /*
 curl -k https://127.0.0.1:48345/api/allstate
 */
@@ -38,6 +40,7 @@ func NewApiServerConf() (ac ApiServerConf) {
 	return
 }
 
+// if fs == nil, flag.CommandLine will be used
 func (asc *ApiServerConf) SetupFlags(fs *flag.FlagSet) {
 	if fs == nil {
 		fs = flag.CommandLine
@@ -92,8 +95,6 @@ func (m *M) TryRunApiServer() {
 
 }
 
-const eIllegalParameter = "illegal parameter"
-
 // 阻塞
 func (m *M) runApiServer() {