diff --git a/Labs/Lab3/source/实验3_21281280_柯劲帆_物联网.md b/Labs/Lab3/source/实验3_21281280_柯劲帆_物联网.md
index 817ae81..ea5dcb5 100644
--- a/Labs/Lab3/source/实验3_21281280_柯劲帆_物联网.md
+++ b/Labs/Lab3/source/实验3_21281280_柯劲帆_物联网.md
@@ -89,10 +89,10 @@
 
 ### 4.1.1.发送方
 
-**定义一个数据包类`Package`，包含数据和`seqnum`。**
+**定义一个数据包类`Packet`，包含数据和`seqnum`。**
 
 ```python
-class Package:
+class Packet:
     def __init__(self, data:str, seq_num:int) -> None:
         self.data = data
         self.seq_num = seq_num
@@ -146,20 +146,20 @@ class NetworkLayer:
 
   ```python
   def __init__(
-              self, 
-              window_size:int, 
-              max_seq_num:int,
-              timeout_ms:2000, 
-              networkLayer:NetworkLayer,
-          ) -> None:
-          self.window_size = window_size
-          self.max_seq_num = max_seq_num
-          self.package_list:list[Package] = [None] * (self.max_seq_num + 1)
-          self.base_num = 1
-          self.next_seq_num = 1
-          self.timeout_ms = timeout_ms
-          self.networkLayer = networkLayer
-          self.timer = None
+          self, 
+          window_size:int, 
+          max_seq_num:int,
+          timeout_ms:2000, 
+          networkLayer:NetworkLayer,
+      ) -> None:
+      self.window_size = window_size
+      self.max_seq_num = max_seq_num
+      self.packet_list:list[Packet] = [None] * (self.max_seq_num + 1)
+      self.base_num = 1
+      self.next_seq_num = 1
+      self.timeout_ms = timeout_ms
+      self.networkLayer = networkLayer
+      self.timer = None
   ```
 
 - 上层调用
@@ -171,10 +171,10 @@ class NetworkLayer:
       if self.next_seq_num >= self.base_num + self.window_size:
           return False
   
-      self.package_list[self.next_seq_num] = Package(data, self.next_seq_num)
+      self.packet_list[self.next_seq_num] = Packet(data, self.next_seq_num)
       self.udt_send(
-          self.package_list[self.next_seq_num].data, 
-          self.package_list[self.next_seq_num].seq_num
+          self.packet_list[self.next_seq_num].data, 
+          self.packet_list[self.next_seq_num].seq_num
       )
       if self.base_num == self.next_seq_num:
           self.timer = time.time()
@@ -196,7 +196,7 @@ class NetworkLayer:
           print(f"将base_num设置为下一个序列编号。")
           self.timer = None
       else:
-          print(f"将base_num设置为{self.package_list[self.base_num].seq_num}。")
+          print(f"将base_num设置为{self.packet_list[self.base_num].seq_num}。")
   ```
 
 - 向下层发送数据
@@ -229,8 +229,8 @@ class NetworkLayer:
       seq_index = self.base_num
       while seq_index < self.next_seq_num:
           self.udt_send(
-              self.package_list[seq_index].data, 
-              self.package_list[seq_index].seq_num
+              self.packet_list[seq_index].data, 
+              self.packet_list[seq_index].seq_num
           )
           seq_index += 1
   ```
@@ -242,7 +242,7 @@ class NetworkLayer:
       show = []
       seq_index = self.base_num
       while seq_index < self.next_seq_num:
-          show.append(self.package_list[seq_index].seq_num)
+          show.append(self.packet_list[seq_index].seq_num)
           seq_index += 1
       return show
   ```
diff --git a/Labs/Lab3/src/Sender.py b/Labs/Lab3/src/Sender.py
index b546d86..c9f58f2 100644
--- a/Labs/Lab3/src/Sender.py
+++ b/Labs/Lab3/src/Sender.py
@@ -2,16 +2,18 @@ import time
 import socket
 import random
 
-class Package:
+class Packet:
     def __init__(self, data:str, seq_num:int) -> None:
         self.data = data
         self.seq_num = seq_num
 
+
 class ApplicationLayer:
     def __init__(self, data_len:int=5000) -> None:
         self.data_len = data_len
         self.data_to_send = ["data{:0>4d}".format(i) for i in range(data_len)]
 
+
 class NetworkLayer:
     def __init__(self, host:str, port:int) -> None:
         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
@@ -34,7 +36,8 @@ class NetworkLayer:
     def close(self):
         self.client_socket.close()
         self.socket.close()
-        
+
+
 class Sender:
     def __init__(
             self, 
@@ -45,7 +48,7 @@ class Sender:
         ) -> None:
         self.window_size = window_size
         self.max_seq_num = max_seq_num
-        self.package_list:list[Package] = [None] * (self.max_seq_num + 1)
+        self.packet_list:list[Packet] = [None] * (self.max_seq_num + 1)
         self.base_num = 1
         self.next_seq_num = 1
         self.timeout_ms = timeout_ms
@@ -58,10 +61,10 @@ class Sender:
         if self.next_seq_num >= self.base_num + self.window_size:
             return False
         
-        self.package_list[self.next_seq_num] = Package(data, self.next_seq_num)
+        self.packet_list[self.next_seq_num] = Packet(data, self.next_seq_num)
         self.udt_send(
-            self.package_list[self.next_seq_num].data, 
-            self.package_list[self.next_seq_num].seq_num
+            self.packet_list[self.next_seq_num].data, 
+            self.packet_list[self.next_seq_num].seq_num
         )
         if self.base_num == self.next_seq_num:
             self.timer = time.time()
@@ -79,7 +82,7 @@ class Sender:
             print(f"将base_num设置为下一个序列编号。")
             self.timer = None
         else:
-            print(f"将base_num设置为{self.package_list[self.base_num].seq_num}。")
+            print(f"将base_num设置为{self.packet_list[self.base_num].seq_num}。")
         
     def udt_send(self, data:str, index:int):
         index_data = '{:0>3d} '.format(index) + data
@@ -100,8 +103,8 @@ class Sender:
         seq_index = self.base_num
         while seq_index < self.next_seq_num:
             self.udt_send(
-                self.package_list[seq_index].data, 
-                self.package_list[seq_index].seq_num
+                self.packet_list[seq_index].data, 
+                self.packet_list[seq_index].seq_num
             )
             seq_index += 1
 
@@ -109,7 +112,7 @@ class Sender:
         show = []
         seq_index = self.base_num
         while seq_index < self.next_seq_num:
-            show.append(self.package_list[seq_index].seq_num)
+            show.append(self.packet_list[seq_index].seq_num)
             seq_index += 1
         return show
 
diff --git a/Labs/Lab3/实验3_21281280_柯劲帆_物联网.pdf b/Labs/Lab3/实验3_21281280_柯劲帆_物联网.pdf
index 10f61a6..509d369 100644
Binary files a/Labs/Lab3/实验3_21281280_柯劲帆_物联网.pdf and b/Labs/Lab3/实验3_21281280_柯劲帆_物联网.pdf differ