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Printing the screenshot above, we can see that the subscriber receives every message from the publisher. However, for Xiao Hong, she only wants to receive messages with red color and does not want to receive messages with black color. Therefore, we need to make the following modifications to the code. We can first add a key so that the subscriber can only subscribe to messages of interest to herself. The code is as follows:In the factory method mode, the factory class and the specific product class have a parallel hierarchical structure, and there is a one-to-one correspondence between them.猴子说道：都是些老同学了，难得一起出来聚聚。12. Ships with limited manoeuvring capacity are exempt from the provisions of this Article when engaged in laying, repairing or lifting submarine cables in the traffic separation system area to the extent necessary to perform the operation.他们全无防备的情况下被敌人袭击，尤其是他们都打着火把，在黑暗之中及时别人的活靶子。It can also postpone ontology instantiation until it is really needed. For an ontology object that takes time to instantiate, or an ontology that is too large to be stored in memory when not in use, we can postpone instantiating the object.