diff --git a/seg.go b/seg.go
deleted file mode 100755
index cc312fc..0000000
--- a/seg.go
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2013 Hui Chen
-// Copyright 2016 ego authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License"): you may
-// not use this file except in compliance with the License. You may obtain
-// a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-// License for the specific language governing permissions and limitations
-// under the License.
-
-package gse
-
-// AnalyzeToken analyze the segment info structure
-type AnalyzeToken struct {
-	// 分词在文本中的起始位置
-	Start int
-	End   int
-
-	Position int
-	Len      int
-
-	Type string
-
-	Text string
-	Freq float64
-	Pos  string
-}
-
-// Segment 文本中的一个分词
-type Segment struct {
-	// 分词在文本中的起始字节位置
-	start int
-
-	// 分词在文本中的结束字节位置（不包括该位置）
-	end int
-
-	Position int
-
-	// 分词信息
-	token *Token
-}
-
-// Start 返回分词在文本中的起始字节位置
-func (s *Segment) Start() int {
-	return s.start
-}
-
-// End 返回分词在文本中的结束字节位置（不包括该位置）
-func (s *Segment) End() int {
-	return s.end
-}
-
-// Token 返回分词信息
-func (s *Segment) Token() *Token {
-	return s.token
-}
diff --git a/seg_utils.go b/seg_utils.go
index ecad9b1..7103ad7 100755
--- a/seg_utils.go
+++ b/seg_utils.go
@@ -227,3 +227,28 @@ func Join(text []Text) string {
 	}
 	return string(b)
 }
+
+func printTokens(tokens []*Token, numTokens int) (output string) {
+	for iToken := 0; iToken < numTokens; iToken++ {
+		for _, word := range tokens[iToken].text {
+			output += fmt.Sprint(string(word))
+		}
+		output += " "
+	}
+	return
+}
+
+func toWords(strings ...string) []Text {
+	words := []Text{}
+	for _, s := range strings {
+		words = append(words, []byte(s))
+	}
+	return words
+}
+
+func bytesToString(bytes []Text) (output string) {
+	for _, b := range bytes {
+		output += (string(b) + "/")
+	}
+	return
+}
diff --git a/segmenter_test.go b/segmenter_test.go
index 1e929e2..479162c 100755
--- a/segmenter_test.go
+++ b/segmenter_test.go
@@ -20,7 +20,7 @@ func TestGetVer(t *testing.T) {
 	ver := GetVersion()
 
 	tt.Expect(t, Version, ver)
-	expect(t, Version, ver)
+	tt.Expect(t, Version, ver)
 	tt.Equal(t, Version, ver)
 }
 
diff --git a/test_utils.go b/test_utils.go
deleted file mode 100755
index 9793d27..0000000
--- a/test_utils.go
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2013 Hui Chen
-// Copyright 2016 ego authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License"): you may
-// not use this file except in compliance with the License. You may obtain
-// a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-// License for the specific language governing permissions and limitations
-// under the License.
-
-package gse
-
-import (
-	"fmt"
-	"testing"
-)
-
-func printTokens(tokens []*Token, numTokens int) (output string) {
-	for iToken := 0; iToken < numTokens; iToken++ {
-		for _, word := range tokens[iToken].text {
-			output += fmt.Sprint(string(word))
-		}
-		output += " "
-	}
-	return
-}
-
-func toWords(strings ...string) []Text {
-	words := []Text{}
-	for _, s := range strings {
-		words = append(words, []byte(s))
-	}
-	return words
-}
-
-func bytesToString(bytes []Text) (output string) {
-	for _, b := range bytes {
-		output += (string(b) + "/")
-	}
-	return
-}
-
-func expect(t *testing.T, expect string, actual interface{}) {
-	actualString := fmt.Sprint(actual)
-	if expect != actualString {
-		t.Errorf("期待值=\"%s\", 实际=\"%s\"", expect, actualString)
-	}
-}
diff --git a/token.go b/token.go
index 2490cae..f7e8230 100755
--- a/token.go
+++ b/token.go
@@ -15,6 +15,51 @@
 
 package gse
 
+// AnalyzeToken analyze the segment info structure
+type AnalyzeToken struct {
+	// 分词在文本中的起始位置
+	Start int
+	End   int
+
+	Position int
+	Len      int
+
+	Type string
+
+	Text string
+	Freq float64
+	Pos  string
+}
+
+// Segment 文本中的一个分词
+type Segment struct {
+	// 分词在文本中的起始字节位置
+	start int
+
+	// 分词在文本中的结束字节位置（不包括该位置）
+	end int
+
+	Position int
+
+	// 分词信息
+	token *Token
+}
+
+// Start 返回分词在文本中的起始字节位置
+func (s *Segment) Start() int {
+	return s.start
+}
+
+// End 返回分词在文本中的结束字节位置（不包括该位置）
+func (s *Segment) End() int {
+	return s.end
+}
+
+// Token 返回分词信息
+func (s *Segment) Token() *Token {
+	return s.token
+}
+
 // Text 字串类型，可以用来表达
 //	1. 一个字元，比如 "世" 又如 "界", 英文的一个字元是一个词
 //	2. 一个分词，比如 "世界" 又如 "人口"