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栏目通过版面以及动画片、动画电影和节目，丰富同学们和小朋友们的精神生活。Use the-S option to indicate the "source address" in the "matching condition", that is, if the source address of the message belongs to the address corresponding to-S, then the message meets the matching condition, and-S means source, indicating the source address.而一心一意在乎的刘邦，这会却也脱离了掌控的范围。In essence, classification is to find the common points and differences of things in our thoughts. It is the basic method and ability for us to know and understand the world. On the basis of classification, it is possible to judge and reason, and to form concepts and make decisions. Classification requires comprehensive demonstration activities such as association, analogy, reasoning and extension, and is the basic cell of thinking.An exampleWhen TCP transmits data, instead of directly submitting the data to the application for processing, it is temporarily stored in the accept buffer, the size of which is represented by the TCP window. If the size of the TCP window is 0, it means that the accept buffer has been filled and the sender should stop sending data until the window on the receiver is updated.