使转动

And it mainly studies the piston and connecting rod movement rule as well as crank link motion gear movement envelopment. This research does not consider the outside force and makes the crank to maintain the uniform speed rotation.

本课题以应用为目的，面向于企业实际产品，主要研究了在不考虑外力作用并使曲轴保持匀速转动的情况下，活塞和连杆的运动规律以及曲柄连杆机构的运动包络。

Once more, applys three-dimensional CAD software Pro/Engineer establishing the geometry models of all kinds of parts in the crank link mechanism, then useing the Pro/E software assembling function assembles the components of crank link into the piston module, the connecting rod module and the crank module, then using Pro/E software mechanism analysis module (Pro/Mechanism), establishes the multi-rigid dynamics model of the crank link, and carries on the kinematics analysis and the dynamics analysis simulation, and it studies the piston and the connecting rod movement rule as well as crank link motion gear movement envelopment. The analysis of simulation results shows that those simulation results are meet to true working state of engine.

再次，应用三维CAD软件：Pro/Engineer建立了曲柄连杆机构各零部件的几何模型，在此工作的基础上，利用Pro/E软件的装配功能，将曲柄连杆机构的各组成零件装配成活塞组件、连杆组件和曲轴组件，然后利用Pro/E软件的机构分析模块(Pro/Mechanism)，建立曲柄连杆机构的多刚体动力学模型，进行运动学分析和动力学分析模拟，研究了在不考虑外力作用并使曲轴保持匀速转动的情况下，活塞和连杆的运动规律以及曲柄连杆机构的运动包络。

The spinning outer core of the Earth generates a protective magnetic shield around the planet, defending life from lethal space radiation.

而地球的外核是一层具有磁性的防护罩，它保护着地球，使地球不被宇宙的射线所伤，并能围绕着行星转动。

Perhaps in the matter of pure picturesqueness the most seriou s thing that ever happened to England was the discovery of galvanized iron roofi ng; but, after all, there was never anything but quiet and rich and comfortable beauty about red roofs, whereas the living windmill is not only beautiful but ro mantic too: a willing, man serving creature, yoked to the elements, a whirling monster, often a thing of terror.

也许如果只从景物的美观别致来说，英国所遭遇的最大不幸乃是锌镀铁屋顶的发明；不过，毕竟红色屋顶的美好也不只是安详富丽与舒适而已，但是转动着的风车不仅看起来美丽，而且非常浪漫：一个受制于自然的魔力但情愿为人类服务的温顺家伙，一个飞舞旋转的怪物或者往往是一个使人惧怕的东西。

The obscurity augmented the acuteness of his hearing; at the slightest sound he rose and hastened to the door, convinced they were about to liberate him, but the sound died away, and Dantès sank again into his seat. At last, about ten o'clock, and just as Dantès began to despair, steps were heard in the corridor, a key turned in the lock, the bolts creaked, the massy oaken door flew open, and a flood of light from two torches pervaded the apartment. By the torchlight Dantès saw the glittering sabres and carbines of four gendarmes. He had advanced at first, but stopped at the sight of this display of force.

幽暗使他的听觉变得敏锐了起来，每有一个微弱声音传进这个房间，他就赶快站起来到门边，都认为是来释放他的，但声音又渐渐沉寂了，唐太斯只好颓然地坐在了他的木凳子上，最后，大约到了十点左右，唐太斯开始绝望的时候，一把钥匙插入了锁，并转动了一下，门闩嘎嘎地响了几声，那笨重的大铁门便突然打开了，两只火把上的光照亮了整个房间，借着火把的灯光，唐太斯看清了四个宪兵身佩闪光的佩刀和马枪，他迎上前去，但一看到这些新增的士兵便又停下步来。

A dam constructed across a stream to raise the water level so that the overflow will have sufficient power to turn a mill wheel.

磨坊水坝横跨溪流建造的堤坝，以提高水位使溢满的水有足够的动力转动磨坊的水轮

Rectifier motor - so excited DC generator string for AC motor, and the fait accompli of such motors, due to alternating current in the magnetic field and the armature circuit, while turning, the moment the direction of Constant Couple remain unchanged, it is turning non-stop.

整流电动机--使串激直流发电机，作交流电动机用，即成此种电动机，因交流电在磁场与电枢电路中，同时转向，故力偶矩之方向恒保持不变，该机乃转动不停。

When the reel on the reel diameter capillary gradually increases, like turning round trip, using the lever principle, continuously variable belt tensioning force the initiative under the round rotating movable pulley disc produce axial movement of the work of change with diameter, pipeline so that the speed of reel hair always synchronized with the tractor forward speed.

当卷筒上毛管卷盘直径逐渐增大时，仿行轮转动，利用杠杆原理，无级变速带在张紧轮旋转下迫使主动带轮可动盘产生轴向移动，改变带的工作直径，从而使卷筒毛管线速度始终与拖拉机前进速度同步。

From the primary mirror and a plane mirror the composition of focus image on the tube side, the focus of its focus, said Newton.

在镜筒侧面可以安置多种不同的终端设备，转动平面镜就可使其中一种处于工作状态。

While the count, with greater and greater expenditure of energy, enchanted the spectators by the unexpectedness of the nimble pirouettes and capers of his supple legs, Marya Dmitryevna with the slightest effort in the movement of her shoulders or curving of her arms, when they turned or marked the time with their feet, produced no less impression from the contrast, which everyone appreciated, with her portliness and her habitual severity of demeanour.

如果认为，伯爵跳得越来越痛快，他那出乎意料的灵活转动和脚步从容的轻盈跳跃会使观众心神向往，那末，玛丽亚德米特里耶夫娜在转身或踏拍子时，肩膀一动或者手臂一卷曲，就可轻而易举地产生同样良好的印象；虽然她的身躯过分地肥胖，态度素来严厉，每个观众仍然赞赏不已。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。