添加一点注释

src/plugins/chat/utils.py

@@ -208,14 +208,14 @@ def get_recent_group_speaker(chat_stream_id: int, sender, limit: int = 12) -> li
     if not recent_messages:
         return []
 
-    who_chat_in_group = []
+    who_chat_in_group = []  # ChatStream列表
 
     duplicate_removal = []
     for msg_db_data in recent_messages:
         user_info = UserInfo.from_dict(msg_db_data["user_info"])
         if (user_info.user_id, user_info.platform) != sender \
                 and (user_info.user_id, user_info.platform) != (global_config.BOT_QQ, "qq") \
-                and (user_info.user_id, user_info.platform) not in duplicate_removal:
+                and (user_info.user_id, user_info.platform) not in duplicate_removal:  # 排除重复，排除消息发送者，排除bot(此处bot的平台强制为了qq，可能需要更改)
 
             duplicate_removal.append((user_info.user_id, user_info.platform))
             chat_info = msg_db_data.get("chat_info", {})