To stability analysis of tethered balloon, a three dimensional nonlinear mathematical model tethered aerostat was assembled.为研究系留气球稳定性,建立了系留气球的三维非线性动力学模型....
Last November the commission gave its stamp of approval to the deal.去年11月，委员会核准了这宗交易。It's FREEPOST, so there's no need for a stamp.这是免费邮寄，不用贴邮票。The stamp was a dull blue colour.邮票是晦暗的深蓝色。...
He also proposed and discussed the problem of isoperimetric figures.他还提出并讨论过等周问题.Based on FEM theory, a program of isoperimetric quadrilateral element is made using MATLAB software.基于有限元理论, 用MATLAB语言编制了四结点等参元计算机程序....