中国东北发现的化石表明，有羽毛的动物很显然并不会飞行，同样那些看起来和鸟一模一样的动物也不会飞。
Fossils from north-eastern China show animals that had feathers but clearly could not have flown, as well as ones that look like proper birds.
当你躺在你自己临终的床上的时候，你仍将被不明飞行物所迷惑，就像你的今天被迷惑一模一样。
As you lie on your own death-bed you will be as mystified about UFOs as you are today.
论述了综合运用非线性动态逆、自适应模糊系统和滑模控制的优点进行飞行控制律设计的方法。
The design of the flight controller that exploits the advantages of the nonlinear dynamic inversion, adaptive fuzzy system and slide model control is discussed.
对极限3D飞行发烧模友来说，任何一点力量和速度对螺距控制都是珍贵的。CCPM十字盘控制提供了这些优势。
For extreme hard 3D pilots, every bit of force and speed in pitch control is appreciated and CCPM offers just that.
这说明基于反馈线性化的滑模控制方案较好地解决了该型直升机垂直飞行的控制问题。
The results show that the controlled helicopter can track the given trajectories stably and the proposed control scheme can solve the control problem of the helicopter vertical flight satisfactorily.
基于充液飞行器的简化模型，在状态空间中设计控制规律以约束状态至滑模。滑模通过在一个约化空间中求解最优控制问题获得，其解是角速度作为姿态变量的函数。
A control law, that constrains the state to follow the sliding mode in the state space, is designed on the basis of a nonlinear, simplified model of the completely liquid-filled spacecraft dynamics.
在分析某型导弹原有“模飞”测试方法的基础上，针对其硬件环境提出了一种新的利用弹载飞行软件进行“模飞”测试的方法。
Software-modeling principles and model-verifying methods are introduced in the paper, and a real project is modeled based on the methods according to requirements of missile-borne software.
在分析某型导弹原有“模飞”测试方法的基础上，针对其硬件环境提出了一种新的利用弹载飞行软件进行“模飞”测试的方法。
Software-modeling principles and model-verifying methods are introduced in the paper, and a real project is modeled based on the methods according to requirements of missile-borne software.
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