默认一个机器手的存在，并对其进行操作，有左右移动，上下移动，抓住物体和松开物体等几个状态。用谓词逻辑语言对其进行操作。-The default a machine hand of existence, and the operation, of moving around, move, seize the objects and loosen objects and so on several state. Use predicate logic operate on the language