diff --git a/logic/Preparation/Interface/ISkill.cs b/logic/Preparation/Interface/ISkill.cs
index aa1629a..7f7934a 100644
--- a/logic/Preparation/Interface/ISkill.cs
+++ b/logic/Preparation/Interface/ISkill.cs
@@ -48,8 +48,8 @@ namespace Preparation.Interface
                     openStartTime = Environment.TickCount;
                     return true;
                 }
-                else return false;
             }
+            return false;
         }
 
         public int isBeingUsed = 0;//实为bool
diff --git a/logic/Server/CopyInfo.cs b/logic/Server/CopyInfo.cs
index 6552b94..30f19de 100644
--- a/logic/Server/CopyInfo.cs
+++ b/logic/Server/CopyInfo.cs
@@ -82,7 +82,7 @@ namespace Server
 
             foreach (var keyValue in player.ActiveSkillDictionary)
             {
-                int progress = keyValue.Value.SkillCD - Environment.TickCount + keyValue.Value.OpenStartTime;
+                int progress = keyValue.Value.SkillCD - time + keyValue.Value.OpenStartTime;
                 msg.StudentMessage.TimeUntilSkillAvailable.Add(progress < 0 ? 0 : progress);
             }
             for (int i = 0; i < GameData.maxNumOfSkill - player.ActiveSkillDictionary.Count; ++i)
@@ -126,7 +126,7 @@ namespace Server
             };
             foreach (var keyValue in player.ActiveSkillDictionary)
             {
-                int progress = keyValue.Value.SkillCD - Environment.TickCount + keyValue.Value.OpenStartTime;
+                int progress = keyValue.Value.SkillCD - time + keyValue.Value.OpenStartTime;
                 msg.TrickerMessage.TimeUntilSkillAvailable.Add(progress < 0 ? 0 : progress);
             }
             for (int i = 0; i < GameData.maxNumOfSkill - player.ActiveSkillDictionary.Count; ++i)