diff --git a/.vscode/launch.json b/.vscode/launch.json
index 8985a2d..b9684c9 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -10,5 +10,11 @@
             "request": "launch",
             "program": "lib/main.dart"
         },
+        {
+            "name": "Flutter: Run all Tests",
+            "type": "dart",
+            "request": "launch",
+            "program": "./test/testCommand.dart"
+        }
     ]
 }
\ No newline at end of file
diff --git a/lib/src/command/matrix.dart b/lib/src/command/matrix.dart
index be6310b..997a72e 100644
--- a/lib/src/command/matrix.dart
+++ b/lib/src/command/matrix.dart
@@ -15,9 +15,11 @@ class MatrixUtil {
         buffer.write('   ');
         buffer.write(d.toStringAsFixed(SettingData.fixedNum.round()) + '  ');
       }
-      buffer.write("\n");
+      buffer.write("\n\n");
     }
-    return buffer.toString();
+    var result = buffer.toString();
+    result = result.substring(0,result.length - 2);
+    return result;
   }
 
   ///矩阵复制
@@ -248,7 +250,7 @@ class MatrixUtil {
   static List<List<num>> upperTriangular(List<List<num>> list) {
     //(n-1)!*2n  (n-1)!n
     var newlist = copyMatrix(list); //拷贝出一个新矩阵
-    var divisor = new List(list.length); //记录对角线下的每一行的倍数
+    var divisor = new List(list.length); //用于记录对角线下的每一行的倍数
     for (int i = 0; i < newlist.length; i++) {
       if (newlist[i][i] == 0) {
         //如果该对角线上的元素为零，将最近的不为零的一行换上来
diff --git a/lib/src/view/route/equationRoute.dart b/lib/src/view/route/equationRoute.dart
index df11533..46b0e96 100644
--- a/lib/src/view/route/equationRoute.dart
+++ b/lib/src/view/route/equationRoute.dart
@@ -16,9 +16,7 @@ class EquationRoute extends StatefulWidget {
 class _EquationRouteState extends State<EquationRoute>
     with TickerProviderStateMixin {
   final TextEditingController _lineQuasController = TextEditingController();
-  final TextEditingController _varController = TextEditingController();
   final FocusNode _lineQuasFocusNode = new FocusNode();
-  final FocusNode _varFocusNode = new FocusNode();
   AnimationController controller;
   Animation<double> animation;
   String result = '';
@@ -41,35 +39,29 @@ class _EquationRouteState extends State<EquationRoute>
         mainAxisAlignment: MainAxisAlignment.center,
         children: <Widget>[
           Text(XiaomingLocalizations.of(context).equationTip),
-          SizedBox(height: 50.0,),
-          Container(
-            padding: const EdgeInsets.symmetric(vertical: 20.0, horizontal: 40.0),
-            child: CupertinoTextField(
-              clearButtonMode: OverlayVisibilityMode.editing,
-              focusNode: _lineQuasFocusNode,
-              controller: _lineQuasController,
-              textCapitalization: TextCapitalization.words,
-              decoration: BoxDecoration(
-                border: Border(
-                    bottom:
-                        BorderSide(width: 0.0, color: CupertinoColors.black)),
-              ),
-              placeholder: 'Equation',
-            ),
+          SizedBox(
+            height: 50.0,
           ),
           Container(
-            padding: EdgeInsets.symmetric(vertical: 20.0, horizontal: 40.0),
-            child: CupertinoTextField(
-              clearButtonMode: OverlayVisibilityMode.editing,
-              focusNode: _varFocusNode,
-              controller: _varController,
-              textCapitalization: TextCapitalization.words,
-              decoration: BoxDecoration(
-                border: Border(
-                    bottom:
-                        BorderSide(width: 0.0, color: CupertinoColors.black)),
+            padding:
+                const EdgeInsets.symmetric(vertical: 20.0, horizontal: 40.0),
+            child: Card(
+              elevation: 0.0,
+              child: Container(
+                padding: const EdgeInsets.all(10.0),
+                child: CupertinoTextField(
+                  clearButtonMode: OverlayVisibilityMode.editing,
+                  focusNode: _lineQuasFocusNode,
+                  controller: _lineQuasController,
+                  textCapitalization: TextCapitalization.words,
+                  decoration: BoxDecoration(
+                    border: Border(
+                        bottom:
+                            BorderSide(width: 0.0, color: CupertinoColors.black)),
+                  ),
+                  placeholder: 'Equation',
+                ),
               ),
-              placeholder: 'Parameter',
             ),
           ),
           Container(
@@ -130,6 +122,7 @@ class _EquationRouteState extends State<EquationRoute>
         color: CupertinoColors.black,
       ),
       child: CupertinoPageScaffold(
+        backgroundColor: CupertinoColors.lightBackgroundGray,
         navigationBar: CupertinoNavigationBar(
           trailing: buildTrailingBar(<Widget>[
             CupertinoButton(
@@ -162,7 +155,6 @@ class _EquationRouteState extends State<EquationRoute>
           behavior: HitTestBehavior.translucent,
           onTap: () {
             _lineQuasFocusNode.unfocus();
-            _varFocusNode.unfocus();
           },
           child: SingleChildScrollView(
             child: Container(
@@ -178,20 +170,12 @@ class _EquationRouteState extends State<EquationRoute>
 
   void _handleLineEquation() {
     _lineQuasFocusNode.unfocus();
-    _varFocusNode.unfocus();
     if (_lineQuasController.text.length != 0) {
-      if (_varController.text.length != 0) {
-        EquationsUtil handle = EquationsUtil.getInstance();
-        var re = handle.handleEquation(
-            _lineQuasController.text);
-        setState(() {
-          result = re;
-        });
-      } else {
-        setState(() {
-          result = XiaomingLocalizations.of(context).variableNotEmpty;
-        });
-      }
+      EquationsUtil handle = EquationsUtil.getInstance();
+      var re = handle.handleEquation(_lineQuasController.text);
+      setState(() {
+        result = re;
+      });
     } else {
       setState(() {
         result = XiaomingLocalizations.of(context).equationNotEmpty;
diff --git a/lib/src/view/route/homeRoute.dart b/lib/src/view/route/homeRoute.dart
index 27e667f..06bcab1 100644
--- a/lib/src/view/route/homeRoute.dart
+++ b/lib/src/view/route/homeRoute.dart
@@ -90,10 +90,10 @@ class HomeRouteState extends State<HomeRoute> with TickerProviderStateMixin {
                 height: _buttonsIsVisible ? 1.0 : 0.0,
                 color: _buttonsIsVisible ? Colors.black : null,
               ),
-              new Container(
-                decoration: new BoxDecoration(
-                  color: Theme.of(context).cardColor,
-                ),
+              AnimatedSize(
+                vsync: this,
+                curve: Curves.ease,
+                duration: Duration(milliseconds: 500),
                 child: Container(
                   height: _buttonsIsVisible ? 200.0 : 0.0,
                   child: buildButtons(_handleTextButton),
diff --git a/lib/src/view/widget/myButtons.dart b/lib/src/view/widget/myButtons.dart
index 0433c75..38ee883 100644
--- a/lib/src/view/widget/myButtons.dart
+++ b/lib/src/view/widget/myButtons.dart
@@ -83,6 +83,10 @@ class _SettingSheetState extends State<SettingSheet> {
             onPressed();
           },
           child: const Text("Delete All Message"),
+        ),
+        CupertinoActionSheetAction(
+          onPressed: () {},
+          child: Text('Language:  ${Localizations.localeOf(context).languageCode == 'zh' ? 'Chinese' : 'English'}'),
         )
       ],
       cancelButton: CupertinoActionSheetAction(
diff --git a/test/testCommand.dart b/test/testCommand.dart
index a86e765..6904e4a 100644
--- a/test/testCommand.dart
+++ b/test/testCommand.dart
@@ -6,7 +6,7 @@ import 'package:xiaoming/src/data/appData.dart';
 
 void main() {
   final ud = new UserData();
-
+  
   test('testEquation', () {
     var instance = EquationsUtil.getInstance();
     print(instance.handleEquation('1,-2,1'));