求英译汉的翻译，比较多，一大段英语。不要用机器翻译
As a machine component, a shaft is commonly a cylindrical bar that supports and rotates with devices for receiving and delivering rotary motion and torque. The crankshaft of a reciprocating engine receives its rotary motion from each of the cranks, via the pistons and connecting rods(the slider-crank mechanism), and delivers it by means of coupling, gears, chains or belts to the transmission, camshaft, pump and other devices. The camshaft, driven by a gear or chain from the crank-shaft delivers rotary motion to the valve actuating mechanism.
An axle is usually defined as a stationary cylindrical member on which wheels and pulleys can rotate, but the rotating shafts that drive the rear wheels of an automobile are also called axles, no doubt a carryover from horse-and-buggy days. It is common practice to speak of short shafts on machines as spindles, especially tool-carrying or work-carrying shafts on machine tools.
In the days when all machines in a shop were driven by one large electric motor or a prime mover, it was necessary to have long lineshafts running the length of the shop and supplying power, by belts, to shorter counter-shafts jackshaft, or headshafts. These lineshafts were assembled from separate lengths of shafting clamped together by rigid couplings. Although it is usually more convenient to drive each machine with a separate electric motor, and the present-day trend is in this direction, there are still some situations in which a group drive is more economical.
作为机器的组成部分，轴通常是一个圆柱形杆，用来支持和旋转装置，接收和传递旋转运动和转矩。往复式发动机的曲轴的旋转运动来自各个曲柄，通过活塞和连杆（曲柄滑块机构），并把它用联轴器，齿轮，链条或皮带传动，凸轮轴，泵和其他设备。通过齿轮或链条传动的凸轮轴，把旋转运动传递到阀门调节装置。轴通常被定义为一个固定的圆柱成员，车轮和滑轮可以旋转，但是旋转轴驱动汽车后轮也被称为轴，肯定是由旧天。这是常见的做法，说短轴为主轴的工具或机器，特别work-carrying轴工具机。一般情况下，在加工店是由一个电动马达或原动机，这是必要的，有长lineshafts运行长度的商店和供电，带，较短的counter-shafts中间轴，或headshafts。这些lineshafts组装从不同长度的轴系钳制由刚性联轴器。虽然通常是开车更方便，每个机有一个单独的电动机，和现在的趋势是朝这个方向，仍然有一些情况下，一组驱动更经济。
轴通常被定义为一个固定的圆柱成员，车轮和滑轮可以旋转，但是旋转轴驱动汽车后轮也被称为轴，肯定是由旧天。这是常见的做法，说短轴为主轴的工具或机器，特别work-carrying轴工具机。
在所有的日子，在加工店是由一个电动马达或原动机，它是必要的，有长lineshafts运行长度的商店和供电，带，较短的counter-shafts中间轴，或headshafts。这些lineshafts组装从不同长度的轴系钳制由刚性联轴器。虽然通常是开车更方便，每个机有一个单独的电动机，和现在的趋势是朝这个方向，仍然有一些情况下，一组驱动更经济。 这是我姐姐翻译的。也不知道正不正确。
