Keywords: geometric nonlinearity, sag effect, equivalent modulus of elasticity, vehicle - bridge interaction.关键词: 几何非线性 、 中垂效应 、 等效弹性系数 、 车桥互制.The eigenfrequency of oscillation cavity is the function of cavity's geo...
He would have to accept it; there was no other way.对此他将别无选择，只有接受。Some of the older telephones still only accept tokens.一些较老式的电话机仍然只收代币。They don't accept any foolishness when it comes to spending money.在花钱的问题上，他们向来很谨...
一只鸽子从塔里钻出来，扑扑地拍打着翅膀。A pigeon emerges, wings flapping noisily, from the tower.耗时五年才钻到了基岩。It took five years to drill down to bedrock.窗户对他来说实在太小，他钻不过去。The window was far too small for him to get through....