According to the normal model of UAV, then the force and moment of the deadlock rudder are regarded as constant disturbance, the models of differential horizontal tail UAV and flying head tail UAV which are related to the spiral motion are established respectively. 然后以正常无人机模型为基础,把方向舵卡死产生的力与力矩当作常值扰动,分别建立了常规布局无人机和差动平尾无人机与螺旋运动相关的模型。
So if we want the train to be safe, it is necessary to ensure the thumb head tail hook and round brake beam stanchion dowels are in good condition. 因此,对列车钩尾扁销和制动梁支柱圆销故障检查是保证列车行车安全的必要条件。
I couldn't make head nor tail of the damn film. 这部该死的影片我一点儿都看不懂。
He rambled on at great length but I couldn't make head or tail of what he said. 他夹七夹八地说了许多话,我没听懂是什么意思。
Velvety black Australian bird of paradise with green and purple iridescence on head and tail. 天鹅绒般黑色的澳大利亚天堂鸟,头部和尾部有绿色和紫色的虹彩。