能源节约的理念产生于1973年的石油危机。Energy conservation as a philosophy was born out of the 1973 oil crisis.化工厂提出增产节约的倡仪,其他工厂随即响应.The chemical plant proposed to increase production and practise economy and other factories presently res...
他们几乎完全与外界绝缘了.They were almost completely cut off from the outside world.请检查一下我屋子里电线的绝缘情况.Please examine the insulation of the electric wires in my house.电线通常以一层橡皮或纸绝缘.One often insulates telephone wires by a covering of ...
For a system, Hamiltonian is invariant under any translation of spatial coordinates.对于一体系, 哈密算符在任何空间坐标变换下是不变的.The results of this part are obtained by model hamiltonian.这一部分的推导采用的是模型哈密顿量.Aim The Hamiltonian is transforme...