diff --git a/Zframework/stringExtend.lua b/Zframework/stringExtend.lua
index e8df857b..ca2ccdbd 100644
--- a/Zframework/stringExtend.lua
+++ b/Zframework/stringExtend.lua
@@ -77,11 +77,11 @@ end
 
 function STRING.time(t)
     if t<60 then
-        return format("%.3f\"",t)
+        return format("%.3f″",t)
     elseif t<3600 then
-        return format("%d'%05.2f\"",int(t/60),int(t%60*100)/100)
+        return format("%d′%05.2f″",int(t/60),int(t%60*100)/100)
     else
-        return format("%d:%.2d'%05.2f\"",int(t/3600),int(t/60%60),int(t%60*100)/100)
+        return format("%d:%.2d′%05.2f″",int(t/3600),int(t/60%60),int(t%60*100)/100)
     end
 end