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/readyFlyWeightFactory is responsible for creating and managing meta-units. When a client requests, the factory needs to check whether there are eligible objects in the current object pool. If so, it returns the existing object. If not, it creates a new object. FlyWeight is a superclass. When it comes to shared pools, It is easy to think of JDBC connection pooling in Java, Considering the characteristics of each connection, It is not difficult for us to sum up: Applies to several objects that are shared, They have some common attributes, Take the database connection pool as an example, url, driverClassName, username, password and dbname, these attributes are the same for each connection, so it is suitable to use the meta-sharing mode to process, build a factory class, take the above similar attributes as internal data and the others as external data, and pass them in as parameters when calling methods, thus saving space and reducing the number of instances.1977年冬天，徐天和费兵前往县城报名，参加文革后第一次高考。他们是陕西西安插队知青，是关系非常铁的哥们。徐天聪明绝顶，记忆力惊人，出身干部家庭的费兵对他非常佩服。半路上，徐天突然想起忘带公社介绍信，情急之下居然私刻公章，伪造介绍信。虽然顺利报名，却埋下了巨大隐忧。完全失去了兴趣和生气，行尸走肉一般。《火速救兵》（英语：F.S.D.）是香港电台电视部与香港消防处联合制作的单元剧。的，是一班临危不乱的救护员。他们为痛得呼天抢地的伤者进行急救、为吓至惊魂未定的市民伸出救援之手。勇气不是上天赋予，处变不惊的能力也不是一朝一夕而来的。消防员和救护员的「周身刀、张张利」，是艰苦训练的成果。由消防处长至所有消防员，都是由训练学校这个大摇篮培育出来的。在短短的二十六周内，学员学到的岂止是救火救人的技术，还有团结合作和不分你我的无私精神。Three, on the development and construction of industrial companies:——小龙女让杨过睡寒冰床，杨过睡在寒冰床上，越睡越冷，最后全身发抖，牙齿不停咬动，咯咯作响。