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3. Some types, such as the core trading engine of the exchange, control the trading process. If multiple types can be created, the system will be completely chaotic. (For example, if there are multiple commanders in an army who command at the same time, there will definitely be a mess), so only by using the singleton mode can the core transaction server independently control the whole process. The following is an analysis of some examples that we need to pay attention to when applying singleton pattern in the development process.(3) Do a good job of performance appraisal every month, and start writing again. And write all kinds of materials according to the company's requirements at all times.看着呆呆等待指示的指挥使，严世藩失望道：这都想不到么？昭告天下，汪东城率倭人洗劫杭州，尽是倭人，没一个汉人。在寻找过程中，卫斯理面对同甘共苦的知心爱人白素，和与其有着莫名情愫的方天涯，陷入了两难境地。刘氏抿嘴笑道：瞧娘说的，那往后黄瓜他们媳妇娘就不心疼了。二水奈何不得兰芝，忽然想起自己曾经丢下的女儿丫丫，就去找绿叶要回女儿，绿叶坚决不答应，二水就跑到绿叶娘家和婆家去闹事。Chasing and Lingyunyue are two dash skills: