The actual mechanism includes hydraulic cylinders, tubing, and metal pads that squeeze on a perforated disk, but we simplify all that out of our minds, creating a more effective, albeit less accurate, mental model.

• 而实际的机制包括液压缸、油管，以及压挤多孔盘的金属垫板。 想像中我们简化了这一切，我们创造了虽不精确、但更有效的心理模型。