推

If we receive a ciphertext and the MAC over the ciphertext is valid, we presume with very high probability that the message came from our peer and has not been tampered.

如果我们收到密文，并在密陆委会是有效的，我们具有非常高的概率推定该消息来自我们的同行，也没有被篡改。

Because any reports on the active control of rotating disk haven't be seen in China up to now, and this experiment research is important, so the complete set of active control system of rotating disk are built independently. The push-pull type electromagnet is applied to control the vibration of the circular disk. The power amplifier circuit that can respond to wide scope in frequency from DC to AC is designed by improving the existing circuit. The sensor signal is first low-pass filtered, then the proportional control plus the differential control circuit easy used in practice are applied to finish the more effective control. The electromagnetism shield is used as possible to decrease the signal disturbance from the electromagnet to eddy sensor.

考虑到目前国内尚未见到有关旋转圆盘振动主动控制的相关报导以及实验的重要性，自行设计制作了一整套旋转圆盘振动主动控制系统：提出并采用推拉型电磁作动器来控制圆盘的振动；在改进现有电路的基础上，自行设计了具有较理想特性的驱动电磁作动器的功率放大器；根据实际控制环境的特点，设计了先进行低通滤波，再采用比例和实用的近似微分电路构成的控制器，并采用了电磁屏蔽来减小电磁铁对传感器的干扰，以实现更有效的控制。

Finally it analyzes the feasibility that using hydromechanics to analyze traffic flow by contrasting various characters between traffic flow and fluid flow. It analyzes influence of road alignment to basic expressway segment capacity by hydromechanics, and obtains viscous resistance and viscous movement differential equation when the vehicle drives on circular curve segment of expressway. And it infers that viscous resistance is correlated with sideway force coefficient, slope of crown and radius of circular curve. Radius of circular curve, sideway force coefficient and slope of crown are bigger, viscous resistance is smaller, the influence to capacity is smaller when the vehicle is running on nearside lane of circular curve; but radius of circular curve and sideway force coefficient are bigger, slope of crown is smaller, viscous resistance is smaller, the influence to capacity is smaller when the vehicle is running on fast lane of circular curve.

最后通过对比交通流与流体流的相似性，运用流体力学分析了道路线形对快速路基本路段通行能力的影响，求出了车辆在曲线路段的粘性阻力，建立了车辆在曲线路段的粘性运动微分方程，并由此推知，粘性阻力与横向力系数、路拱横坡度和圆曲线半径都有关系，当车辆在圆曲线外侧车道上行驶时，圆曲线半径、横向力系数和路拱横坡度越大，粘性阻力就越小，对道路的通行能力影响就越小；而当车辆在圆曲线内侧车道上行驶时，圆曲线半径和横向力系数越大，路拱横坡度越小，粘性阻力就越小，对道路的通行能力影响就越小。

This was no time for red tape and circumlocution, although these have their place in a well-ordered, placid system

官僚习气和推三拖四的作风，在按部就班、平平稳稳的秩序里还可以，但现在却不合时宜。

This was no time for red tape and circumlocution, although these have their place in a well-orde red , placid system

官僚习气和推三拖四的作风，在按部就班、平平稳稳的秩序里还可以，但现在却不合时宜。

Miss Tang was pushing her clapped-out old Ford to a garage.

唐小姐当时正在推着她的破旧的福特车去修理站。

A mechanical device usually a bearing, clevis or similar component attached to the end of a link or push-pull type rod.

杠杆端，一个连在活节连杆一端或推拉杆一端的通常是轴承，吊环，或类似元件的机械装置。

The only rowboat scene I knew was the one in which Montgomery Clift pushes Shelley Winters into the water.

我所知的唯一的小舟上的场景是蒙哥马利克利夫特将谢利文斯特推入水中。

He was in a field,before him was one of those low hills covered with close-cut stubble, which, after the harvest, resemble shaved heads

他已到了田野中，在他前面，有一片矮丘，丘上覆着齐地割了的麦茬，那矮丘在收获之后就象推光了的头一样。

Naturally, we seem to be considered guilty until proven innocent, which won't happen if this Shojo guy is as close-minded and judgmental as his servant is.

当然了，我们似乎受到了有罪推定。但要是这个叫Shojo的家伙跟他的仆从一样狭隘和武断的话，证明我们的清白就根本不可能。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！