Based on the demands of two limit states, the design control equations of cross section for prestressed concrete beam are derived and the direct design method is presented.

根据两类极限状态的基本要求，建立了预应力混凝土梁截面设计的控制方程，提出了直接设计方法。

youdao

The existence of bounded states and limit sets are concerned in order to explain chaos and turbulence phenomena in quantum field theory. Bifurcation and two critical speeds are discussed.

有界状态和极限集的存在性解释了量子场理论中混沌现象与湍流现象的内涵，并讨论了分歧现象与临界速度。

youdao

This may be why the United States introduced a two-term limit for their presidents.

BBC: Manmohan Singh at 80

Two big member states, France and Germany, have repeatedly breached the 3% limit.

ECONOMIST: If only they could all be like Luxembourg | The