我在本网站(MySolidWorks)下载了一个模型，用solidworks打开时确什么也显示不了，我想问一下，是我下载的模型（装配体）中没有零件模型，所以打开错误，还是我打开后需要做点别的什么来解决这个问题，提前感谢各位！

I downloaded a model from this website(MySolidworks), but when I open it with SolidWorks, nothing is displayed. I want to ask whether there are no part models in the assembly model I downloaded, so there is an error when opening it, or do I need to do something else after opening it to solve this problem? Thank you in advance!