If a response is received, the request object registers a ready state of 4.
如果接收到一个响应，那么请求对象会注册为就绪状态4。
All properties have been set and the properties object is ready to be used.
所有属性均已设置，可以使用Properties对象了。
Once the parameters object is instantiated, you are ready to invoke the REST service.
当参数对象实例化完成之后，您就准备好了调用REST服务。
For sending email, there is no such ready made object to help us.
发送电子邮件，没有这样的现成的对象，以帮助我们。
For sending email, there is no such ready made object to help us.
发送电子邮件，没有这样的现成的对象，以帮助我们。
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