In the electronic-device example, that transistor is a component-of operational amplifier or that the latter is a type-of electronic device is just as much a fact about its domain as a CYC fact about some aspect of space, time or numbers.

• 在工程设计中，或许会讨论到电子设备领域的本体，它包含一些描述基本概念的词汇，比如晶体管，运算放大器，电压等；也包含这些基本元素间的关系，运算放大器是电子设备的一种，而晶体管是运算放大器的组件。