diff --git a/Zframework/bgm.lua b/Zframework/bgm.lua
index 2d446fc5..0a1b0dc5 100644
--- a/Zframework/bgm.lua
+++ b/Zframework/bgm.lua
@@ -57,8 +57,16 @@ function BGM.setChange(func)
     BGM.onChange=func
 end
 function BGM.setVol(v)
-    assert(type(v)=='number'and v>=0 and v<=1)
+    assert(type(v)=='number'and v>=0 and v<=1,'Wrong volume')
     volume=v
+    if BGM.playing then
+        if volume>0 then
+            BGM.playing:setVolume(volume)
+            BGM.playing:play()
+        elseif BGM.nowPlay then
+            BGM.playing:pause()
+        end
+    end
 end
 function BGM.init(list)
     BGM.init=nil
@@ -92,18 +100,6 @@ function BGM.init(list)
             LOG("No BGM: "..name,5)
         end
     end
-    function BGM.setVol(v)
-        assert(type(v)=='number'and v>=0 and v<=1)
-        volume=v
-        if BGM.playing then
-            if volume>0 then
-                BGM.playing:setVolume(volume)
-                BGM.playing:play()
-            elseif BGM.nowPlay then
-                BGM.playing:pause()
-            end
-        end
-    end
     function BGM.play(name)
         name=name or BGM.default
         if not _tryLoad(name)then return end
diff --git a/Zframework/sfx.lua b/Zframework/sfx.lua
index 1e068b58..5b507dc0 100644
--- a/Zframework/sfx.lua
+++ b/Zframework/sfx.lua
@@ -72,11 +72,11 @@ function SFX.getCount()
     return #sfxList
 end
 function SFX.setVol(v)
-    assert(type(v)=='number'and v>=0 and v<=1)
+    assert(type(v)=='number'and v>=0 and v<=1,'Wrong volume')
     volume=v
 end
 function SFX.setStereo(v)
-    assert(type(v)=='number'and v>=0 and v<=1)
+    assert(type(v)=='number'and v>=0 and v<=1,'Wrong stereo')
     stereo=v
 end
 
diff --git a/parts/scenes/dict.lua b/parts/scenes/dict.lua
index e3ac900b..97deb070 100644
--- a/parts/scenes/dict.lua
+++ b/parts/scenes/dict.lua
@@ -115,8 +115,9 @@ function scene.keyDown(key)
         for _=1,12 do scene.keyDown("up")end
     elseif key=="right"or key=="pagedown"then
         for _=1,12 do scene.keyDown("down")end
-    elseif key=="link"then
-        love.system.openURL(_getList()[selected].url)
+    elseif key=="application"then
+        local url=_getList()[selected].url
+        if url then love.system.openURL(url)end
     elseif key=="delete"then
         if inputBox:hasText()then
             _clearResult()
@@ -213,7 +214,7 @@ scene.widgetList={
     WIDGET.newText{name='book',   x=20,y=15,font=70,align='L',fText=CHAR.icon.zBook},
     WIDGET.newText{name='title',  x=100,y=15,font=70,align='L'},
     inputBox,
-    WIDGET.newKey{name='link',    x=1120,y=655,w=80,font=55,fText=CHAR.icon.globe, code=pressKey"link",hideF=function()return not _getList()[selected].url end},
+    WIDGET.newKey{name='link',    x=1120,y=655,w=80,font=55,fText=CHAR.icon.globe, code=pressKey"application",hideF=function()return not _getList()[selected].url end},
     WIDGET.newKey{name='copy',    x=1210,y=655,w=80,font=50,fText=CHAR.icon.copy,  code=pressKey"cC"},
     WIDGET.newKey{name='up',      x=1120,y=475,w=80,font=50,fText=CHAR.key.up,     code=pressKey"up",hide=not MOBILE},
     WIDGET.newKey{name='down',    x=1120,y=565,w=80,font=50,fText=CHAR.key.down,   code=pressKey"down",hide=not MOBILE},