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FLYWEIGHT refers to the lightest weight in boxing. The meta-sharing mode efficiently supports a large number of fine-grained objects in a shared way. The key to sharing the meta-sharing mode is to distinguish the intrinsic state from the extrinsic state. The intrinsic state is stored in the element and will not vary with the change of environment. The exogenous state changes with the change of environment. The extrinsic state cannot affect the intrinsic state, they are independent of each other. Distinguish the states that can be shared from the states that cannot be shared from the regular class, and eliminate the states that cannot be shared from the class. Clients cannot directly create shared objects, but should use a factory object to create shared objects. The meta-sharing mode greatly reduces the number of objects in memory.Table 1Modern hockey emerged in England in the second half of the 19th century. The 4th Olympic Games in 1908 was listed as a competition event.2000年 ルパン三世1$マネーウォーズ 一美元战争自始至终，杨寿全夫妇都没有问过为什么，去哪里一类的问题。