diff --git a/STranslate/MainWindow.xaml b/STranslate/MainWindow.xaml
index 800293e..2967ea6 100644
--- a/STranslate/MainWindow.xaml
+++ b/STranslate/MainWindow.xaml
@@ -28,8 +28,9 @@
             CornerRadius="10">
         <Grid>
             <Grid.RowDefinitions>
-                <RowDefinition Height="3*"/>
                 <RowDefinition Height="5*"/>
+                <RowDefinition Height="*"/>
+                <RowDefinition Height="8*"/>
             </Grid.RowDefinitions>
 
             <hc:NotifyIcon Text="STranslate"
@@ -39,20 +40,21 @@
                            Icon="/Images/translate.ico"/>
             
             <!--input-->
-            <Grid Margin="10">
+            <Grid x:Name="Input"
+                  Margin="10,10,10,0">
                 <!--输入框-->
-                <Border BorderBrush="#000"
+                <Border x:Name="BorderInput" BorderBrush="#000"
                         BorderThickness="1"
                         CornerRadius="4"
                         Margin="5"
-                        MaxHeight="200">
+                        Height="{Binding ElementName=Input, Path=Height}">
                     <TextBox x:Name="TextBoxInput"
                              Background="Transparent"
                              BorderBrush="{x:Null}"
                              Margin="5"
                              BorderThickness="0"
                              FontSize="18"
-                             MinHeight="35"
+                             Width="{Binding ElementName=BorderInput, Path=ActualWidth}"
                              TextWrapping="Wrap"
                              VerticalAlignment="Top"
                              HorizontalAlignment="Left"
@@ -64,19 +66,36 @@
                     </TextBox>
                 </Border>
             </Grid>
-            <!--output-->
-            <Grid Margin="10"
-                  Grid.Row="1">
+            <!--mid-->
+            <StackPanel Grid.Row="1"
+                        Margin="10,0,10,0"
+                        Orientation="Horizontal">
                 <Label Content="翻译结果: "
-                       VerticalAlignment="Top"
+                       VerticalAlignment="Center"
                        HorizontalAlignment="Left"/>
-
+                <Label Content="当前语言:"
+                       Margin="10,0,0,0"/>
+                <ComboBox x:Name="InCombo"
+                          Style="{StaticResource ComboBoxBaseStyle}"
+                          ItemsSource="{Binding InputCombo}"
+                          SelectedItem="{Binding InputComboSelected}"/>
+                <Label Content="目标语言:"/>
+                <ComboBox x:Name="OutCombo"
+                          Style="{StaticResource ComboBoxBaseStyle}"
+                          ItemsSource="{Binding OutputCombo}"
+                          SelectedItem="{Binding OutputComboSelected}"/>
+            </StackPanel>
+            <!--output-->
+            <Grid Margin="10,0,10,10"
+                  x:Name="Output"
+                  Grid.Row="2">
                 <!--输出框-->
-                <Border BorderBrush="#000"
+                <Border x:Name="BorderOutput"
+                        BorderBrush="#000"
                         BorderThickness="1"
                         CornerRadius="4"
                         Margin="5"
-                        MaxHeight="200">
+                        Height="{Binding ElementName=Output, Path=Height}">
                     <TextBox x:Name="TextBoxOutput"
                              Background="Transparent"
                              BorderBrush="{x:Null}"
@@ -84,7 +103,8 @@
                              IsReadOnly="True"
                              Margin="5"
                              FontSize="18"
-                             MinHeight="35"
+                             Width="{Binding ElementName=BorderOutput, Path=ActualWidth}"
+                             Height="{Binding ElementName=BorderOutput, Path=Height}"
                              VerticalAlignment="Top"
                              HorizontalAlignment="Left"
                              TextWrapping="Wrap"
diff --git a/STranslate/MainWindow.xaml.cs b/STranslate/MainWindow.xaml.cs
index c6ac31f..9d18456 100644
--- a/STranslate/MainWindow.xaml.cs
+++ b/STranslate/MainWindow.xaml.cs
@@ -34,22 +34,18 @@ namespace STranslate
                 this.Show();
                 this.Activate();
                 this.TextBoxInput.Focus();
-                System.Diagnostics.Debug.Print("alt + a");
             });
             HotkeysUtil.Regist(HotkeyModifiers.MOD_ALT, Key.D, () =>
             {
-                this.Show();
-                this.Activate();
-                this.TextBoxInput.Text = "123";
-                System.Diagnostics.Debug.Print("alt + d");
                 //复制内容
-                //KeyboardUtil.Press(Key.LeftCtrl);
-                //KeyboardUtil.Type(Key.C);
-                //KeyboardUtil.Release(Key.LeftCtrl);
+                KeyboardUtil.Press(Key.LeftCtrl);
+                KeyboardUtil.Type(Key.C);
+                KeyboardUtil.Release(Key.LeftCtrl);
+                System.Diagnostics.Debug.Print(Clipboard.GetText());
 
                 //this.Show();
                 //this.Activate();
-
+                //this.TextBoxInput.Text = "123";
 
                 //this.TextBoxInput.Text = Clipboard.GetText();
                 //this.TextBoxInput.Focus();
@@ -85,6 +81,7 @@ namespace STranslate
             if (e.Key == Key.Escape)
             {
                 this.Hide();
+                this.TextBoxInput.Text = string.Empty;
                 this.TextBoxOutput.Text = string.Empty;
             }
             //退出 Ctrl+Q
@@ -141,8 +138,9 @@ namespace STranslate
         /// <param name="e"></param>
         private void Window_Deactivated(object sender, EventArgs e)
         {
-            this.Hide();
-            this.TextBoxOutput.Text = string.Empty;
+            //this.Hide();
+            //this.TextBoxInput.Text = string.Empty;
+            //this.TextBoxOutput.Text = string.Empty;
         }
     }
 }
diff --git a/STranslate/Model/LanguageEnum.cs b/STranslate/Model/LanguageEnum.cs
index d37c20c..fa50b3e 100644
--- a/STranslate/Model/LanguageEnum.cs
+++ b/STranslate/Model/LanguageEnum.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -8,30 +9,65 @@ namespace STranslate.Model
 {
     public enum LanguageEnum
     {
-        auto,   //自动
+        [Description("自动")]
+        AUTO,   //自动
+        [Description("德语")]
         DE,    //德语
+        [Description("英语")]
         EN,    //英语
+        [Description("西班牙语")]
         ES,    //西班牙语
+        [Description("法语")]
         FR,    //法语
+        [Description("意大利语")]
         IT,    //意大利语
+        [Description("日语")]
         JA,    //日语
+        [Description("荷兰语")]
         NL,    //荷兰语
+        [Description("波兰语")]
         PL,    //波兰语
+        [Description("葡萄牙语")]
         PT,    //葡萄牙语
+        [Description("俄语")]
         RU,    //俄语
+        [Description("中文")]
         ZH,    //中文
+        [Description("保加利亚语")]
         BG,    //保加利亚语
+        [Description("捷克语")]
         CS,    //捷克语
+        [Description("丹麦语")]
         DA,    //丹麦语
+        [Description("希腊语")]
         EL,    //希腊语
+        [Description("爱沙尼亚语")]
         ET,    //爱沙尼亚语
+        [Description("芬兰语")]
         FI,    //芬兰语
+        [Description("匈牙利语")]
         HU,    //匈牙利语
+        [Description("立陶宛语")]
         LT,    //立陶宛语
+        [Description("拉脱维亚语")]
         LV,    //拉脱维亚语
+        [Description("罗马尼亚语")]
         RO,    //罗马尼亚语
+        [Description("斯洛伐克语")]
         SK,    //斯洛伐克语
+        [Description("斯洛文尼亚语")]
         SL,    //斯洛文尼亚语
+        [Description("瑞典语")]
         SV,    //瑞典语
     }
+    //主要这个GetDescription()方法，看不懂没关系，如何调用
+    static class EnumExtensions
+    {
+        public static string GetDescription(this Enum val)
+        {
+            var field = val.GetType().GetField(val.ToString());
+            var customAttribute = Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute));
+            return customAttribute == null ? val.ToString() : ((DescriptionAttribute)customAttribute).Description;
+        }
+    }
 }
diff --git a/STranslate/Utils/HotKeysUtil.cs b/STranslate/Utils/HotKeysUtil.cs
index 153c550..bb51fff 100644
--- a/STranslate/Utils/HotKeysUtil.cs
+++ b/STranslate/Utils/HotKeysUtil.cs
@@ -7,8 +7,9 @@ using System.Windows.Interop;
 
 namespace STranslate.Utils
 {
+    //TODO: 另一个方案: https://www.cnblogs.com/leolion/p/4693514.html
     /// <summary>
-    /// 引用自 https://zhuanlan.zhihu.com/p/445050708
+    /// 引用自 https://blog.csdn.net/weixin_44879611/article/details/103275347
     /// </summary>
     static class HotkeysUtil
     {
diff --git a/STranslate/Utils/KeyboardUtil.cs b/STranslate/Utils/KeyboardUtil.cs
index a8bcf05..66653af 100644
--- a/STranslate/Utils/KeyboardUtil.cs
+++ b/STranslate/Utils/KeyboardUtil.cs
@@ -14,7 +14,7 @@ namespace STranslate.Utils
 
 
     #region Operate Mouse Keyboard
-
+    //引用自: https://www.cnblogs.com/sixty/archive/2009/08/09/1542210.html
     /// <summary>
     /// Native methods
     /// </summary>
diff --git a/STranslate/Utils/TranslateUtil.cs b/STranslate/Utils/TranslateUtil.cs
index 93990ac..e7706db 100644
--- a/STranslate/Utils/TranslateUtil.cs
+++ b/STranslate/Utils/TranslateUtil.cs
@@ -31,7 +31,7 @@ namespace STranslate.Utils
             return string.Empty;
         }
 
-        public static async Task<string> TranslateDeepLAsync(string text, LanguageEnum target, LanguageEnum source = LanguageEnum.auto)
+        public static async Task<string> TranslateDeepLAsync(string text, LanguageEnum target, LanguageEnum source = LanguageEnum.AUTO)
         {
             var req = new DeeplReq()
             {
@@ -50,7 +50,16 @@ namespace STranslate.Utils
             return string.Empty;
         }
 
-        public static async Task<string> TranslateBaiduAsync(string appID, string secretKey, string text, LanguageEnum target, LanguageEnum source = LanguageEnum.auto)
+        /// <summary>
+        /// 百度翻译异步接口
+        /// </summary>
+        /// <param name="appID">应用ID</param>
+        /// <param name="secretKey">应用Secret</param>
+        /// <param name="text">需要翻译的文本</param>
+        /// <param name="target">目标语言</param>
+        /// <param name="source">当前语言</param>
+        /// <returns></returns>
+        public static async Task<string> TranslateBaiduAsync(string appID, string secretKey, string text, LanguageEnum target, LanguageEnum source = LanguageEnum.AUTO)
         {
             Random rd = new Random();
             string salt = rd.Next(100000).ToString();
@@ -102,5 +111,20 @@ namespace STranslate.Utils
             // 返回加密的字符串
             return sb.ToString();
         }
+        /// <summary>
+        /// 枚举信息
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <returns></returns>
+        public static Dictionary<string, T> GetEnumList<T>() where T : Enum
+        {
+            var dict = new Dictionary<string, T>();
+            List<T> list = Enum.GetValues(typeof(T)).OfType<T>().ToList();
+            list.ForEach(x =>
+            {
+                dict.Add(x.GetDescription(), x);
+            });
+            return dict;
+        }
     }
 }
diff --git a/STranslate/ViewModel/MainVM.cs b/STranslate/ViewModel/MainVM.cs
index 450e5fc..947a992 100644
--- a/STranslate/ViewModel/MainVM.cs
+++ b/STranslate/ViewModel/MainVM.cs
@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Windows;
 using System.Windows.Input;
 
 namespace STranslate.ViewModel
@@ -13,12 +14,19 @@ namespace STranslate.ViewModel
     {
         private static readonly string ConfigPath = @"D:\STranslate.yml";
         public static ConfigModel config = new ConfigModel();
+        private static Dictionary<string, LanguageEnum> LanguageEnumDict { get => TranslateUtil.GetEnumList<LanguageEnum>(); }
 
         private string Text;
         public MainVM()
         {
             try
             {
+                //初始化界面参数
+                InputCombo = LanguageEnumDict.Keys.ToList();
+                InputComboSelected = LanguageEnum.AUTO.GetDescription();
+                OutputCombo = LanguageEnumDict.Keys.ToList();
+                OutputComboSelected = LanguageEnum.EN.GetDescription();
+
                 config = ConfigUtil.ReadConfig(ConfigPath);
 
 
@@ -37,7 +45,7 @@ namespace STranslate.ViewModel
                     //获取结果
                     //var translateResp = await TranslateUtil.TranslateDeepLAsync(InputTxt, LanguageEnum.EN, LanguageEnum.auto);
 
-                    var translateResp = await TranslateUtil.TranslateBaiduAsync(config.baidu.appid, config.baidu.secretKey, Text, LanguageEnum.EN, LanguageEnum.auto);
+                    var translateResp = await TranslateUtil.TranslateBaiduAsync(config.baidu.appid, config.baidu.secretKey, Text, LanguageEnumDict[OutputComboSelected], LanguageEnumDict[InputComboSelected]);
 
                     if (translateResp == string.Empty)
                     {
@@ -45,7 +53,9 @@ namespace STranslate.ViewModel
                         return;
                     }
                     OutputTxt = translateResp;
+                    Clipboard.SetText(OutputTxt);
                 });
+
             }
             catch (Exception ex)
             {
@@ -57,8 +67,21 @@ namespace STranslate.ViewModel
 
         private string _InputTxt;
         public string InputTxt { get => _InputTxt; set => UpdateProperty(ref _InputTxt, value); }
+
         private string _OutputTxt;
         public string OutputTxt { get => _OutputTxt; set => UpdateProperty(ref _OutputTxt, value); }
 
+        private List<string> _InputCombo;
+        public List<string> InputCombo { get => _InputCombo; set => UpdateProperty(ref _InputCombo, value); }
+
+        private string _InputComboSelected;
+        public string InputComboSelected { get => _InputComboSelected; set => UpdateProperty(ref _InputComboSelected, value); }
+
+        private List<string> _OutputCombo;
+        public List<string> OutputCombo { get => _OutputCombo; set => UpdateProperty(ref _OutputCombo, value); }
+
+        private string _OutputComboSelected;
+        public string OutputComboSelected { get => _OutputComboSelected; set => UpdateProperty(ref _OutputComboSelected, value); }
+
     }
 }