其他地方的，我们详细调查后各种动物的运动，它们之间的差异，其特定人物的原因（有些动物飞行，一些游泳，有的步行，有的提出各种其他方式）;那里仍然是一个调查的任何动物的任何这类行动的共同基础。现在我们已经确定（当我们讨论是否永恒的议案存在与否，它的定义，如果它确实存在），所有其他议案的起源是，自己的动作，而且这一原产地是不动产，原动机的必要性，必须不动产。我们必须抓住这个不只是一般，在理论上，而且还参照世界的感觉个人，这些看法与我们所寻求的一般理论，并与这些我们认为的一般理论应该统一。现在，在世界上的意义也，显然是不可能将要开展的运动，如果有什么是休息，而在我们目前的所有问题，其他动物的生命。因为如果对动物的一个部分移动，另一个必须在休息，这是他们的关节目的;动物使用像一个中心接头，
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    ELSEWHERE we have investigated in detail the movement of animals after their various kinds, the differences between them, and the reasons for their particular characters (for some animals fly, some swim, some walk, others move in various other ways); there remains an investigation of the common ground of any sort of animal movement whatsoever. Now we have already determined (when we were discussing whether eternal motion exists or not, and its definition, if it does exist) that the origin of all other motions is that which moves itself, and that the origin of this is the immovable, and that the prime mover must of necessity be immovable. And we must grasp this not only generally in theory, but also by reference to individuals in the world of sense, for with these in view we seek general theories, and with these we believe that general theories ought to harmonize. Now in the world of sense too it is plainly impossible for movement to be initiated if there is nothing at rest, and before all else in our present subject- animal life. For if one of the parts of an animal be moved, another must be at rest, and this is the purpose of their joints; animals use joints like a centre,