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Through the management of the connection pool, the sharing of database connections is realized, and the connection does not need to be recreated every time, thus saving the overhead of database recreation and improving the performance of the system! This chapter explains 7 structural patterns, due to space problems, the remaining 11 behavioral patterns,该剧根据1996年前FBI探员约翰·道格拉斯（JohnDouglas）和马克·欧夏克（Mark Olshaker）的著作《心理神探：美国联邦调查局系列犯罪破案揭秘》（MindHunter: Inside the FBI's Elite Serial Crime Unit）改编。退休后的道格拉斯深入研究犯罪心理学，美剧《汉尼拔》（Hannibal）和《犯罪心理》（CriminalMinds）中的角色刻画也参考了书中的很多案例。Lins Concubine 01The lights specified in the terms of these Rules shall have the luminous intensity specified in Section 8 of Appendix I to these Rules so as to be visible at the following minimum distances:可我不想给赵文华当儿子。The UGC and PGC modes rely on the output of users, so the advantage is that there is a lot of room for expansion of output and interest points, and the content output by users is easier to meet the needs of users. However, the quality cannot be guaranteed, requiring manpower review or intervention sequencing, and there is no way to control the timeliness greatly.