We need to get a service reference, which allows us to introspect properties of the service itself, and then use that to get the service that we're interested in.
我们需要获得一个服务引用，它可以让我们查看服务自身内部的属性，然后利用其来获得我们感兴趣的服务。
3
In addition, 10% of all positive stool samples are being sent to NAMRU 3 reference laboratory (US Navy Advanced Research Unit) in Cairo for further confirmation and phenotypic characterization.