Asynchronous - If the consumer crashes while waiting for the response after sending the request, when it restarts it can continue waiting for the response, so the response is not lost.

异步——如果使用者在发送了请求之后等待响应时崩溃了，当它重新启动时，可以继续等待响应，所以响应不会丢失。

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If the request is asynchronous, this method returns immediately after sending the request.

如果请求是异步的，这个方法会在发送请求之后立即返回。

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In general, sending a message on queue is an asynchronous activity.

一般而言，在队列中发送消息是一个异步的活动。

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