user node

例句：

1. 1.The user node is responsible for handling the user's requests and responses.
   用户节点负责处理用户的请求和响应。
2. 2.The user node is connected to the server through a network connection.
   用户节点通过网络连接连接到服务器。
3. 3. The user node can be used to store and retrieve data from the server.
   用户节点可以用来存储和从服务器检索数据。