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In this paper, the author discusses the origin and the development of the aseismic design medel code,approaches the role and the characteristics of the model code, points out the necessity and the ways of drawing up and developing the model code in China, and puts forward a set of relatively complete classification of engineering structure operation function based on the performance design, and proposes the principles, framework and the methods of aseismic design classification.

文摘：论述了抗震设计样板规范的由来和发展，探讨了样板规范的作用和特点，提出了在我国编制和发展样板规范的必要性和途径，且提出了一套较完整的、基于性态设计的工程结构使用功能分类和抗震设计分类的原则、框架和方法。

In Chapter 2, we discussed set Zn*whose members are all relatively prime to n.

在第二章中，我们讨论

Mr Wilson's account is set in the context of Dodgson's life and traces the evolution of his interests, which was relatively slight.

Wilson以Dodgson的生活经历作为背景展开论述，并记录了他的兴趣的产生和变化过程，以此作为支线。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。