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If an application uses a large number of objects, and a large number of these objects cause a large storage overhead, it should be considered. Also, most of the states of the object are external states. If you delete the external states of the object, you can replace many groups of objects with relatively few shared objects, or you can consider using the meta-sharing mode.Since UDP is not a connection protocol, it has the advantages of low resource consumption and fast processing speed. Therefore, UDP is usually used more in audio, video and ordinary data transmission, because even if they occasionally lose one or two data packets, they will not have much impact on the reception results. For example, ICQ and QQ we use to chat are UDP protocols.本剧受M.R. Hall的畅销系列小说启发，主要讲述了一个新任命的验尸官在多伦多调查离奇的死亡案件。本剧于今年夏末将在多伦多地区展开制作，2019年冬在CBC首播。杀劫，是劫，也是运。4. Motor boats to which paragraphs 1 or 3 of this Article apply shall also comply with the provisions of paragraph 1 (b) of Article 23.在德国最著名的夏里特医院 (Charité), 一代又一代医学家和医护人员不但亲眼见证了医学的发展，更是亲身经历了二战的开始与结束，以及其间施行的优生政策。　　◆ ◆ ◆ ◆