Remote method calls still use call-by-value semantics of which you certainly need to be aware.
远程方法调用仍然使用按值调用(call - by - value)语义，您当然需要知道该语义。
That means the result of the remote method call is not immediately available to the executing thread.
这意味着远端方法调用的结果并不能立即对执行线程可用。
A regular round trip remote method call is modeled as two messages, one for the request and one for the response.
一个规则的有往返的远程方法调用有两条消息，一条负责请求，一条负责响应。
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