theoretical abstraction

In the historical process of theoretical abstraction, a lot of valuable and effective ways of practice have been lost or forgotten.

在理论抽象的过程中，许多非常有价值的实践的内容、方法、和原理都被淡化甚至遗忘了。

However, with the ever-increasing scale and influence of mega-events, theories of modern management and urban brand theories become increasingly developed, and such project-based mega-event management is beginning to show its defects& lacking in theoretical abstraction and effective solutions to practice.

但随着特大活动的规模不断扩大，影响日益深远，现代管理和城市品牌理论的不断成熟，基于活动项目的特大活动管理已越来越多地显示出理论的苍白和实践的困惑。

The core of the latter is the interconnections of its categories, and the theoretical abstraction of the former.

后者的核心部分是范畴间的相互关系，也是前者的理论升华。

Theoretical Studies on the Hydrogen Abstraction Reactions of Halogen-Substituted Alkyls

几类卤代烷烃氢迁移反应的理论研究

It is one-sided viewpoint to regard descriptive method and thinking method as theoretical systems from abstraction to concrete.

把从抽象上升到具体仅看作是理论体系的叙述方法或把它仅看作是思维方法的观点都是片面的。

In the last, the traditional ciassification has three chief defects: lcking theoretical abstraction and real value;

最后指出传统分类存在三个主要方面的缺陷：缺乏理论抽象和实际价值；