We have people who have, for example, taken the inside of the engine bay of an old car and tagged up different components within an engine, so that if you're stuck and you want to find out more, you can point and discover the information.
还有人，比如说 将一辆旧车的内部引擎照了下来 并将引擎内不同的组件标记好 所以，如果有什么问题出现，而你需要了解更多的信息 就可以把手机对准零件而获得信息