Even if you don't know what the parts are, puzzling out what they might be for is a really good practice for the kids to get sort of the sense that they can take things apart, and no matter how complex they are, they can understand parts of them.
即便你对这些零件一无所知， 但是动动脑筋，想想每个零件是干什么用的， 这本身已是对孩子们很好的锻炼。 孩子们可以形成这样一种意识， 就是不论机器的内部构造多么复杂，他们都可以把它拆解开， 他们能够从知晓每个零件的功能开始，