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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.BIM technology has changed the traditional modeling thinking, realized the technological innovation of three-dimensional to multi-dimensional information modeling, and truly realized collaborative design. Through the promotion and application of technology, it has become an effective auxiliary tool for owners in the decision-making stage, and the necessary ability for design and construction units to undertake large projects. At present, foreign scholars pay more attention to the interdisciplinary and cross-domain comprehensive application of BIM technology to realize overall management in various aspects and to realize all-round cooperative work in various construction stages, various specialties and during operation. At present, foreign BIM technology is mainly applied to construction, design and operation management in subway.Application Scenario of Decorator Mode:We can see above that the basic process of Baidu's interview is like the above code, so Ali and Tencent's are also similar to the above code (here we don't stick the same code one by one), so we can extract the public code. Let's first define a class called Interview在众人复杂的目光之中，出入巴蜀的唯一路径栈道化为一片火海，再尽数化为灰烬。本季分为三集，聚焦于三位荣获多个重量级奖项的音乐人。分别为H.E.R. aka Gabriella Wilson (E01), Kid Cudi aka Scott Mescudi (E02), 碧梨Billie Eilish (E03) ????