diff --git a/simplify/words.go b/simplify/words.go
index 4d511ce..9cc05e8 100644
--- a/simplify/words.go
+++ b/simplify/words.go
@@ -1,7 +1,6 @@
 package simplify
 
 import (
-	"slices"
 	"strings"
 	"unicode"
 )
@@ -70,7 +69,7 @@ func (w *Words) Simplify() []string {
 	filteredWhole := make([]string, 0)
 	for keyword, times := range repetition {
 		if times == 1 {
-			if slices.Contains(w.input, keyword) {
+			if w.contains(w.input, keyword) {
 				filteredInput = append(filteredInput, keyword)
 			} else {
 				filteredWhole = append(filteredWhole, keyword)
@@ -84,6 +83,15 @@ func (w *Words) Simplify() []string {
 	return result
 }
 
+func (w *Words) contains(arr []string, str string) bool {
+	for _, v := range arr {
+		if v == str {
+			return true
+		}
+	}
+	return false
+}
+
 // isChineseOrSpace 判断给定的rune字符是否为中文或空格
 func (w *Words) isChineseOrSpace(r rune) bool {
 	return r == ' ' || unicode.Is(unicode.Scripts["Han"], r)