When we use a computer to digitally edit sound or to create video special effects like morphing, we are bereft of analogy to the mechanical world, so our mental models are necessarily different from the implementation model.

• 当我们在计算机上进行数字化的声音编辑或者生成视频特效（如变形）时，我们无法在机械世界中找到类似的例子，所以我们的心理模型和实现模型必然是不同的。