Communication diagrams have no concept of the asynchronous message since its focus is not on message ordering.

交互图并不关心异步信息传递，在交互图中没有异步的概念。

youdao

Communication diagrams have no concept of the asynchronous message since its focus is not on message ordering.

交互图并不关心异步信息传递，在交互图中没有异步的概念。

youdao