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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!二零一零年，国家航天局挑选了一个香港科研团队作合作伙伴，于杰教授就是团队的掌舵人，他将会为登月任务研发「相机指向系统」。4. Return to the side of the moon mark to talk to her and choose "I would like to go with her". At this time, the moon mark will attract the monsters and help her clear away the monsters in her field of vision. After clearing the monster, he talked with the moon and went back to find the shadow.The first type is implemented through the relationship between the parent class and the child class. The second category: between the two categories. The third category: the status of the class. Category 4: Through the intermediate category本片改编自日本当代著名作家濑尾麻衣子的同名小说，该小说于2019年荣获“本屋大赏”，横扫日本各大书店，成为平成最后一抹温柔的关照。