单词re-invoked
In other words, each time the service is required, the getService needs to be re-invoked.
换句话说，每当需要服务的时候，需要重新调用getService。
Rather, they should focus on what the services are, what they do, and how they"re invoked.
相反，他们应将重点放在服务是什么、它们完成什么工作以及如何对其进行调用上。