diff --git a/STranslate/Style/Dark/DictionaryCommonDark.xaml b/STranslate/Style/Dark/DictionaryCommonDark.xaml
index db95788..d6e053a 100644
--- a/STranslate/Style/Dark/DictionaryCommonDark.xaml
+++ b/STranslate/Style/Dark/DictionaryCommonDark.xaml
@@ -55,6 +55,8 @@
         <Setter Property="BorderBrush" Value="{x:Null}"/>
         <Setter Property="BorderThickness" Value="0"/>
         <Setter Property="IsReadOnly" Value="True"/>
+        <!--选区颜色-->
+        <Setter Property="SelectionBrush" Value="#404856"/>
         <Setter Property="Margin" Value="10,10,5,35"/>
         <Setter Property="FontSize" Value="16"/>
         <Setter Property="MaxHeight" Value="400"/>
diff --git a/STranslate/ViewModel/MainVM.cs b/STranslate/ViewModel/MainVM.cs
index 44f0da2..c4d9689 100644
--- a/STranslate/ViewModel/MainVM.cs
+++ b/STranslate/ViewModel/MainVM.cs
@@ -79,6 +79,11 @@ namespace STranslate.ViewModel
         /// </returns>
         private Tuple<string, string> AutomaticLanguageRecognition(string text)
         {
+            //https://www.techiedelight.com/zh/strip-punctuations-from-a-string-in-csharp/
+            //预处理
+            text = System.Text.RegularExpressions.Regex.Replace(text,
+                "[1234567890!\"#$%&'()*+,-./:;<=>?@\\[\\]^_`{|}~，。、《》？；‘’：“”【】、{}|·！@#￥%……&*（）——+~\\\\]",
+                string.Empty);
             //如果输入是中文
             if (System.Text.RegularExpressions.Regex.IsMatch(text, @"^[\u4e00-\u9fa5]+$"))
             {