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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.胡家下人上街，都被人指指点点。At this time, the crew of the Changsheng already knew that the people who boarded the ship were not customs border guards, but pirates who came to rob. 　　不忙，我们一点也不忙。旺仔与小伙伴们通过生活中经常遇到的小问题，教小朋友们学知识，含动物篇、植物篇、天文篇、人体篇、化学篇、物理篇。你们说，会不会真有人重生过？要是我能回到十年前，那我肯定不是现在这个鸟样。One last thing on this subject, The 7.62 mm traced armour-piercing firebombs fired by the 81-1 family, Although the name is a little long, But compared with ordinary munitions, The difference is still well understood: Tracing and burning are simple, Is to add two corresponding drugs, The armor piercing is to replace the steel core behind the bullet's brass back armor (also known as bullet head) with a harder tungsten alloy core with stronger penetration to hard targets. The latter is also the tail-stabilized shelling penetrator used on the third generation of modern main battle tanks (abbreviation: APFSDS) is one of the two main materials (the other is the notorious, highly radioactive depleted uranium penetrator core, The user country is mainly the United States, while China mainly uses tungsten alloy penetrators, Less pollution and better performance, The United States does not need to. First, the United States does not pass the standard of tungsten treatment technology. Far from the level of our country, Secondly, the United States is a tungsten-poor country. It also wants to fully use tungsten alloy bombs, But it can't be used, But as a nuclear Power, There is a lot of depleted uranium as nuclear waste, so depleted uranium is selected as a substitute. As for tungsten alloy and depleted uranium, after putting aside the key additional condition of radioactive pollution, the pure question of who is better in armour-piercing performance is not directly related to this article, so it will not be described in detail).