只考三个符号：节点，准线，节点与节点的联系
注意点：节点之间没有箭头，节点是软件还是物理设备需要标记，需要写清连接的介质（如网线那些），协议（HTTP等）
（整个系统就一个）可通过修改下面这个基础模型来做
例子：
The architect(架构师) studied the use case “打卡”, he want a DB server to hold user profiles（用户注册信息）and achievements （成就）, a Web server to provide some services for clients, Mobile phones with
android operation system as client hold MVC component and Proxy services component. A client communicates with the web server using HTTP and JSON protocol.Develop a deployment model to illustrate the architect’s design. Stereotype must be used to
classify physical nodes.