skeleton

/ˈskɛlətən/

something reduced to its minimal form

中文释义：骨架；框架

The skeleton of the building was completed in just three months.

这座建筑的骨架仅用三个月就完成了。

The essay should first outline a skeleton of the main arguments before adding details.

文章应先勾勒主要论点的框架，再添加细节。